diff --git a/.gitignore b/.gitignore
index a2804fe..aaec9ef 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,6 +26,7 @@ gdb.txt
 
 # Generated docs
 _docs/
+docs/resources/_gen/
 /man/
 
 # VLS logs
diff --git a/.woodpecker/arch-rel.yml b/.woodpecker/arch-rel.yml
index f5f228e..f727486 100644
--- a/.woodpecker/arch-rel.yml
+++ b/.woodpecker/arch-rel.yml
@@ -9,7 +9,7 @@ skip_clone: true
 
 pipeline:
   build:
-    image: 'menci/archlinuxarm:base-devel'
+    image: 'git.rustybever.be/vieter-v/vieter-builder'
     commands:
       # Add the vieter repository so we can use the compiler
       - echo -e '[vieter]\nServer = https://arch.r8r.be/$repo/$arch\nSigLevel = Optional' >> /etc/pacman.conf
diff --git a/.woodpecker/arch.yml b/.woodpecker/arch.yml
index 8f1a6ff..f5f8432 100644
--- a/.woodpecker/arch.yml
+++ b/.woodpecker/arch.yml
@@ -9,7 +9,7 @@ skip_clone: true
 
 pipeline:
   build:
-    image: 'menci/archlinuxarm:base-devel'
+    image: 'git.rustybever.be/vieter-v/vieter-builder'
     commands:
       # Add the vieter repository so we can use the compiler
       - echo -e '[vieter]\nServer = https://arch.r8r.be/$repo/$arch\nSigLevel = Optional' >> /etc/pacman.conf
diff --git a/.woodpecker/build.yml b/.woodpecker/build.yml
index 9ee8085..f10e2a5 100644
--- a/.woodpecker/build.yml
+++ b/.woodpecker/build.yml
@@ -1,5 +1,5 @@
 variables:
-  - &vlang_image 'chewingbever/vlang:0.3'
+  - &vlang_image 'git.rustybever.be/chewing_bever/vlang:0.3.2'
 
 matrix:
   PLATFORM:
diff --git a/.woodpecker/docs.yml b/.woodpecker/docs.yml
index 048b1ad..cf4874e 100644
--- a/.woodpecker/docs.yml
+++ b/.woodpecker/docs.yml
@@ -1,5 +1,5 @@
 variables:
-  - &vlang_image 'chewingbever/vlang:0.3'
+  - &vlang_image 'git.rustybever.be/chewing_bever/vlang:0.3.2'
 
 platform: 'linux/amd64'
 branches:
diff --git a/.woodpecker/gitea.yml b/.woodpecker/gitea.yml
index 8e3b9d4..9034f33 100644
--- a/.woodpecker/gitea.yml
+++ b/.woodpecker/gitea.yml
@@ -1,5 +1,5 @@
 variables:
-  - &vlang_image 'chewingbever/vlang:0.3'
+  - &vlang_image 'git.rustybever.be/chewing_bever/vlang:0.3.2'
 
 platform: 'linux/amd64'
 branches: [ 'main' ]
diff --git a/.woodpecker/lint.yml b/.woodpecker/lint.yml
index c80ce33..ec64d13 100644
--- a/.woodpecker/lint.yml
+++ b/.woodpecker/lint.yml
@@ -1,5 +1,5 @@
 variables:
-  - &vlang_image 'chewingbever/vlang:0.3'
+  - &vlang_image 'git.rustybever.be/chewing_bever/vlang:0.3.2'
 
 # These checks already get performed on the feature branches
 branches:
@@ -7,10 +7,21 @@ branches:
 platform: 'linux/amd64'
 
 pipeline:
+  # vfmt seems to get confused if these aren't present
+  install-modules:
+    image: *vlang_image
+    pull: true
+    commands:
+      - export VMODULES=$PWD/.vmodules
+      - 'cd src && v install'
+    when:
+      event: [pull_request]
+
   lint:
     image: *vlang_image
     pull: true
     commands:
+      - export VMODULES=$PWD/.vmodules
       - make lint
     when:
-      event: [ pull_request ]
+      event: [pull_request]
diff --git a/.woodpecker/man.yml b/.woodpecker/man.yml
index 86a1bd8..8c6ca06 100644
--- a/.woodpecker/man.yml
+++ b/.woodpecker/man.yml
@@ -1,5 +1,5 @@
 variables:
-  - &vlang_image 'chewingbever/vlang:0.3'
+  - &vlang_image 'git.rustybever.be/chewing_bever/vlang:0.3.2'
 
 platform: 'linux/amd64'
 branches:
diff --git a/.woodpecker/test.yml b/.woodpecker/test.yml
index 08b7534..39cb9f9 100644
--- a/.woodpecker/test.yml
+++ b/.woodpecker/test.yml
@@ -1,5 +1,5 @@
 variables:
-  - &vlang_image 'chewingbever/vlang:0.3'
+  - &vlang_image 'git.rustybever.be/chewing_bever/vlang:0.3.2'
 
 matrix:
   PLATFORM:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3cd39c4..27d9096 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,33 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased](https://git.rustybever.be/vieter-v/vieter/src/branch/dev)
 
+## [0.5.0-rc.1](https://git.rustybever.be/vieter-v/vieter/src/tag/0.5.0-rc.1)
+
+### Added
+
+* Allow specifying subdirectory inside Git repository
+* Added option to deploy using agent-server architecture instead of cron daemon
+* Allow scheduling builds on the server from the CLI tool instead of building
+  them locally
+* Allow force-building packages, meaning the build won't check if the
+  repository is already up to date
+
+### Changed
+
+* Migrated codebase to V 0.3.2
+* Cron expression parser now uses bitfields instead of bool arrays
+
+### Fixed
+
+* Arch value for target is now properly set if not provided
+* Allow NULL values for branch in database
+* Endpoint for adding targets now returns the correct id
+* CLI now correctly errors and doesn't error when sending requests
+* Fixed possible infinite loop when removing old build images
+* Check whether build image still exists before starting build
+* Don't run makepkg `prepare()` function twice
+* Don't buffer stdout in Docker containers
+
 ## [0.4.0](https://git.rustybever.be/vieter-v/vieter/src/tag/0.4.0)
 
 ### Added
diff --git a/Dockerfile b/Dockerfile
index 7aed917..a27ad44 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM chewingbever/vlang:0.3 AS builder
+FROM git.rustybever.be/chewing_bever/vlang:0.3.2 AS builder
 
 ARG TARGETPLATFORM
 ARG CI_COMMIT_SHA
@@ -23,6 +23,7 @@ RUN if [ -n "${CI_COMMIT_SHA}" ]; then \
             "https://s3.rustybever.be/vieter/commits/${CI_COMMIT_SHA}/vieter-$(echo "${TARGETPLATFORM}" | sed 's:/:-:g')" && \
             chmod +x vieter ; \
     else \
+        cd src && v install && cd .. && \
         LDFLAGS='-lz -lbz2 -llzma -lexpat -lzstd -llz4 -lsqlite3 -static' make prod && \
         mv pvieter vieter ; \
     fi
diff --git a/Makefile b/Makefile
index 69bd795..e716807 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ SRC_DIR := src
 SOURCES != find '$(SRC_DIR)' -iname '*.v'
 
 V_PATH ?= v
-V := $(V_PATH) -showcc -gc boehm
+V := $(V_PATH) -showcc -gc boehm -W -d use_openssl
 
 all: vieter
 
@@ -92,9 +92,9 @@ clean:
 .PHONY: autofree
 autofree: afvieter
 afvieter: $(SOURCES)
-	$(V_PATH) -showcc -autofree -o afvieter $(SRC_DIR)
+	$(V) -showcc -autofree -o afvieter $(SRC_DIR)
 
 .PHONY: skip-unused
 skip-unused: suvieter
 suvieter: $(SOURCES)
-	$(V_PATH) -showcc -skip-unused -o suvieter $(SRC_DIR)
+	$(V) -skip-unused -o suvieter $(SRC_DIR)
diff --git a/PKGBUILD b/PKGBUILD
index b600ba0..94db654 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -3,7 +3,7 @@
 
 pkgbase='vieter'
 pkgname='vieter'
-pkgver='0.4.0'
+pkgver='0.5.0-rc.1'
 pkgrel=1
 pkgdesc="Lightweight Arch repository server & package build system"
 depends=('glibc' 'openssl' 'libarchive' 'sqlite')
diff --git a/README.md b/README.md
index b9fff69..637d4c1 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,8 @@ quicker.
 I chose [V](https://vlang.io/) as I've been very intrigued by this language for
 a while now. I wanted a fast language that I could code while relaxing, without
 having to exert too much mental effort & V seemed like the right choice for
-that.
+that. Sadly, this didn't quite turn out the way I expected, but I'm sticking
+with it anyways ;p
 
 ## Features
 
@@ -49,7 +50,7 @@ update`.
 
 I used to maintain a mirror that tracked the latest master, but nowadays, I
 maintain a Docker image containing the specific compiler version that Vieter
-builds with. Currently, this is V 0.3.
+builds with. Currently, this is V 0.3.2.
 
 ## Contributing
 
diff --git a/docs/content/configuration.md b/docs/content/configuration.md
index af941a2..95bf713 100644
--- a/docs/content/configuration.md
+++ b/docs/content/configuration.md
@@ -17,7 +17,7 @@ If a variable is both present in the config file & as an environment variable,
 the value in the environment variable is used.
 
 {{< hint info >}}
-**Note**  
+**Note**
 All environment variables can also be provided from a file by appending them
 with `_FILE`. This for example allows you to provide the API key from a Docker
 secrets file.
@@ -97,3 +97,25 @@ configuration variable required for each command.
   build`.
     * Default: `archlinux:base-devel`
 
+### `vieter agent`
+
+* `log_level`: log verbosity level. Value should be one of `FATAL`, `ERROR`,
+  `WARN`, `INFO` or `DEBUG`.
+    * Default: `WARN`
+* `address`: *public* URL of the Vieter repository server to build for. From
+  this server jobs are retrieved. All built packages are published to this
+  server.
+* `api_key`: API key of the above server.
+* `data_dir`: directory to store log file in.
+* `max_concurrent_builds`: how many builds to run at the same time.
+    * Default: `1`
+* `polling_frequency`: how often (in seconds) to poll the server for new
+  builds. Note that the agent might poll more frequently when it's actively
+  processing builds.
+* `image_rebuild_frequency`: Vieter periodically builds images that are then
+  used as a basis for running build containers. This is to prevent each build
+  from downloading an entire repository worth of dependencies. This setting
+  defines how frequently (in minutes) to rebuild these images.
+    * Default: `1440` (every 24 hours)
+* `arch`: architecture for which this agent should pull down builds (e.g.
+  `x86_64`)
diff --git a/docs/content/installation.md b/docs/content/installation.md
index 87b9cba..21eda64 100644
--- a/docs/content/installation.md
+++ b/docs/content/installation.md
@@ -21,7 +21,7 @@ branch. This branch will be the most up to date, but does not give any
 guarantees about stability, so beware!
 
 Thanks to the single-binary design of Vieter, this image can be used both for
-the repository server & the cron daemon.
+the repository server, the cron daemon and the agent.
 
 Below is an example compose file to set up both the repository server & the
 cron daemon:
@@ -76,7 +76,7 @@ architectures will build on both.
 ## Binary
 
 On the
-[releases](https://git.rustybever.be/vieter/vieter/releases)
+[releases](https://git.rustybever.be/vieter-v/vieter/releases)
 page, you can find statically compiled binaries for all
 released versions. This is the same binary as used inside
 the Docker images.
@@ -106,5 +106,5 @@ guarantee that a compiler update won't temporarily break them.
 
 ## Building from source
 
-The project [README](https://git.rustybever.be/vieter/vieter#building) contains
-instructions for building Vieter from source.
+The project [README](https://git.rustybever.be/vieter-v/vieter#building)
+contains instructions for building Vieter from source.
diff --git a/docs/content/usage/builds/schedule.md b/docs/content/usage/builds/schedule.md
index 38f76a4..de59e25 100644
--- a/docs/content/usage/builds/schedule.md
+++ b/docs/content/usage/builds/schedule.md
@@ -37,6 +37,6 @@ Each section can consist of as many of these parts as necessary.
 ## CLI tool
 
 The Vieter binary contains a command that shows you the next matching times for
-a given expression. This can be useful to understand the syntax. For more
+a given expression. This can be useful for understanding the syntax. For more
 information, see
 [vieter-schedule(1)](https://rustybever.be/man/vieter/vieter-schedule.1.html).
diff --git a/src/agent/agent.v b/src/agent/agent.v
new file mode 100644
index 0000000..69b9947
--- /dev/null
+++ b/src/agent/agent.v
@@ -0,0 +1,27 @@
+module agent
+
+import log
+import os
+import util
+
+const log_file_name = 'vieter.agent.log'
+
+// agent starts an agent service
+pub fn agent(conf Config) ! {
+	log_level := log.level_from_tag(conf.log_level) or {
+		return error('Invalid log level. The allowed values are FATAL, ERROR, WARN, INFO & DEBUG.')
+	}
+
+	mut logger := log.Log{
+		level: log_level
+	}
+
+	os.mkdir_all(conf.data_dir) or { util.exit_with_message(1, 'Failed to create data directory.') }
+
+	log_file := os.join_path_single(conf.data_dir, agent.log_file_name)
+	logger.set_full_logpath(log_file)
+	logger.log_to_console_too()
+
+	mut d := agent_init(logger, conf)
+	d.run()
+}
diff --git a/src/agent/cli.v b/src/agent/cli.v
new file mode 100644
index 0000000..1535e17
--- /dev/null
+++ b/src/agent/cli.v
@@ -0,0 +1,31 @@
+module agent
+
+import cli
+import conf as vconf
+
+struct Config {
+pub:
+	log_level string = 'WARN'
+	// Architecture that the agent represents
+	arch                    string
+	api_key                 string
+	address                 string
+	data_dir                string
+	max_concurrent_builds   int = 1
+	polling_frequency       int = 30
+	image_rebuild_frequency int = 1440
+}
+
+// cmd returns the cli module that handles the cron daemon.
+pub fn cmd() cli.Command {
+	return cli.Command{
+		name: 'agent'
+		description: 'Start an agent daemon.'
+		execute: fn (cmd cli.Command) ! {
+			config_file := cmd.flags.get_string('config-file')!
+			conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)!
+
+			agent(conf)!
+		}
+	}
+}
diff --git a/src/agent/daemon.v b/src/agent/daemon.v
new file mode 100644
index 0000000..62f36c2
--- /dev/null
+++ b/src/agent/daemon.v
@@ -0,0 +1,197 @@
+module agent
+
+import log
+import sync.stdatomic
+import build
+import models { BuildConfig }
+import client
+import time
+import os
+
+const (
+	build_empty   = 0
+	build_running = 1
+	build_done    = 2
+)
+
+struct AgentDaemon {
+	logger shared log.Log
+	conf   Config
+	client client.Client
+mut:
+	images ImageManager
+	// Which builds are currently running; length is conf.max_concurrent_builds
+	builds []BuildConfig
+	// Atomic variables used to detect when a build has finished; length is
+	// conf.max_concurrent_builds
+	atomics []u64
+}
+
+// agent_init initializes a new agent
+fn agent_init(logger log.Log, conf Config) AgentDaemon {
+	mut d := AgentDaemon{
+		logger: logger
+		client: client.new(conf.address, conf.api_key)
+		conf: conf
+		images: new_image_manager(conf.image_rebuild_frequency * 60)
+		builds: []BuildConfig{len: conf.max_concurrent_builds}
+		atomics: []u64{len: conf.max_concurrent_builds}
+	}
+
+	return d
+}
+
+// run starts the actual agent daemon. This function will run forever.
+pub fn (mut d AgentDaemon) run() {
+	// This is just so that the very first time the loop is ran, the jobs are
+	// always polled
+	mut last_poll_time := time.now().add_seconds(-d.conf.polling_frequency)
+	mut sleep_time := 0 * time.second
+	mut finished, mut empty, mut running := 0, 0, 0
+
+	for {
+		if sleep_time > 0 {
+			d.ldebug('Sleeping for $sleep_time')
+			time.sleep(sleep_time)
+		}
+
+		finished, empty = d.update_atomics()
+		running = d.conf.max_concurrent_builds - finished - empty
+
+		// No new finished builds and no free slots, so there's nothing to be
+		// done
+		if finished + empty == 0 {
+			sleep_time = 1 * time.second
+			continue
+		}
+
+		// Builds have finished, so old builder images might have freed up.
+		// TODO this might query the docker daemon too frequently.
+		if finished > 0 {
+			d.images.clean_old_images()
+		}
+
+		// The agent will always poll for new jobs after at most
+		// `polling_frequency` seconds. However, when jobs have finished, the
+		// agent will also poll for new jobs. This is because jobs are often
+		// clustered together (especially when mostly using the global cron
+		// schedule), so there's a much higher chance jobs are available.
+		if finished > 0 || time.now() >= last_poll_time.add_seconds(d.conf.polling_frequency) {
+			d.ldebug('Polling for new jobs')
+
+			new_configs := d.client.poll_jobs(d.conf.arch, finished + empty) or {
+				d.lerror('Failed to poll jobs: $err.msg()')
+
+				// TODO pick a better delay here
+				sleep_time = 5 * time.second
+				continue
+			}
+
+			d.ldebug('Received $new_configs.len jobs')
+
+			last_poll_time = time.now()
+
+			for config in new_configs {
+				// Make sure a recent build base image is available for
+				// building the config
+				if !d.images.up_to_date(config.base_image) {
+					d.linfo('Building builder image from base image $config.base_image')
+
+					// TODO handle this better than to just skip the config
+					d.images.refresh_image(config.base_image) or {
+						d.lerror(err.msg())
+						continue
+					}
+				}
+
+				// It's technically still possible that the build image is
+				// removed in the very short period between building the
+				// builder image and starting a build container with it. If
+				// this happens, faith really just didn't want you to do this
+				// build.
+
+				d.start_build(config)
+				running++
+			}
+		}
+
+		// The agent is not doing anything, so we just wait until the next poll
+		// time
+		if running == 0 {
+			sleep_time = last_poll_time.add_seconds(d.conf.polling_frequency) - time.now()
+		} else {
+			sleep_time = 1 * time.second
+		}
+	}
+}
+
+// update_atomics checks for each build whether it's completed, and sets it to
+// empty again if so. The return value is a tuple `(finished, empty)` where
+// `finished` is how many builds were just finished and thus set to empty, and
+// `empty` is how many build slots were already empty. The amount of running
+// builds can then be calculated by substracting these two values from the
+// total allowed concurrent builds.
+fn (mut d AgentDaemon) update_atomics() (int, int) {
+	mut finished := 0
+	mut empty := 0
+
+	for i in 0 .. d.atomics.len {
+		if stdatomic.load_u64(&d.atomics[i]) == agent.build_done {
+			stdatomic.store_u64(&d.atomics[i], agent.build_empty)
+			finished++
+		} else if stdatomic.load_u64(&d.atomics[i]) == agent.build_empty {
+			empty++
+		}
+	}
+
+	return finished, empty
+}
+
+// start_build starts a build for the given BuildConfig.
+fn (mut d AgentDaemon) start_build(config BuildConfig) bool {
+	for i in 0 .. d.atomics.len {
+		if stdatomic.load_u64(&d.atomics[i]) == agent.build_empty {
+			stdatomic.store_u64(&d.atomics[i], agent.build_running)
+			d.builds[i] = config
+
+			go d.run_build(i, config)
+
+			return true
+		}
+	}
+
+	return false
+}
+
+// run_build actually starts the build process for a given target.
+fn (mut d AgentDaemon) run_build(build_index int, config BuildConfig) {
+	d.linfo('started build: $config')
+
+	// 0 means success, 1 means failure
+	mut status := 0
+
+	new_config := BuildConfig{
+		...config
+		base_image: d.images.get(config.base_image)
+	}
+
+	res := build.build_config(d.client.address, d.client.api_key, new_config) or {
+		d.ldebug('build_config error: $err.msg()')
+		status = 1
+
+		build.BuildResult{}
+	}
+
+	if status == 0 {
+		d.linfo('Uploading build logs for $config')
+
+		// TODO use the arch value here
+		build_arch := os.uname().machine
+		d.client.add_build_log(config.target_id, res.start_time, res.end_time, build_arch,
+			res.exit_code, res.logs) or { d.lerror('Failed to upload logs for $config') }
+	} else {
+		d.lwarn('an error occurred during build: $config')
+	}
+
+	stdatomic.store_u64(&d.atomics[build_index], agent.build_done)
+}
diff --git a/src/agent/images.v b/src/agent/images.v
new file mode 100644
index 0000000..1fec567
--- /dev/null
+++ b/src/agent/images.v
@@ -0,0 +1,119 @@
+module agent
+
+import time
+import docker
+import build
+
+// An ImageManager is a utility that creates builder images from given base
+// images, updating these builder images if they've become too old. This
+// structure can manage images from any number of base images, paving the way
+// for configurable base images per target/repository.
+struct ImageManager {
+	max_image_age int [required]
+mut:
+	// For each base image, one or more builder images can exist at the same
+	// time
+	images map[string][]string [required]
+	// For each base image, we track when its newest image was built
+	timestamps map[string]time.Time [required]
+}
+
+// new_image_manager initializes a new image manager.
+fn new_image_manager(max_image_age int) ImageManager {
+	return ImageManager{
+		max_image_age: max_image_age
+		images: map[string][]string{}
+		timestamps: map[string]time.Time{}
+	}
+}
+
+// get returns the name of the newest image for the given base image. Note that
+// this function should only be called *after* a first call to `refresh_image`.
+pub fn (m &ImageManager) get(base_image string) string {
+	return m.images[base_image].last()
+}
+
+// up_to_date returns true if the last known builder image exists and is up to
+// date. If this function returns true, the last builder image may be used to
+// perform a build.
+pub fn (mut m ImageManager) up_to_date(base_image string) bool {
+	if base_image !in m.timestamps
+		|| m.timestamps[base_image].add_seconds(m.max_image_age) <= time.now() {
+		return false
+	}
+
+	// It's possible the image has been removed by some external event, so we
+	// check whether it actually exists as well.
+	mut dd := docker.new_conn() or { return false }
+
+	defer {
+		dd.close() or {}
+	}
+
+	dd.image_inspect(m.images[base_image].last()) or {
+		// Image doesn't exist, so we stop tracking it
+		if err.code() == 404 {
+			m.images[base_image].delete_last()
+			m.timestamps.delete(base_image)
+		}
+
+		// If the inspect fails, it's either because the image doesn't exist or
+		// because of some other error. Either way, we can't know *for certain*
+		// that the image exists, so we return false.
+		return false
+	}
+
+	return true
+}
+
+// refresh_image builds a new builder image from the given base image. This
+// function should only be called if `up_to_date` returned false.
+fn (mut m ImageManager) refresh_image(base_image string) ! {
+	// TODO use better image tags for built images
+	new_image := build.create_build_image(base_image) or {
+		return error('Failed to build builder image from base image $base_image')
+	}
+
+	m.images[base_image] << new_image
+	m.timestamps[base_image] = time.now()
+}
+
+// clean_old_images removes all older builder images that are no longer in use.
+// The function will always leave at least one builder image, namely the newest
+// one.
+fn (mut m ImageManager) clean_old_images() {
+	mut dd := docker.new_conn() or { return }
+
+	defer {
+		dd.close() or {}
+	}
+
+	mut i := 0
+
+	for image in m.images.keys() {
+		i = 0
+
+		for i < m.images[image].len - 1 {
+			// For each builder image, we try to remove it by calling the Docker
+			// API. If the function returns an error or false, that means the image
+			// wasn't deleted. Therefore, we move the index over. If the function
+			// returns true, the array's length has decreased by one so we don't
+			// move the index.
+			dd.remove_image(m.images[image][i]) or {
+				// The image was removed by an external event
+				if err.code() == 404 {
+					m.images[image].delete(i)
+				}
+				// The image couldn't be removed, so we need to keep track of
+				// it
+				else {
+					i += 1
+				}
+
+				continue
+			}
+
+			m.images[image].delete(i)
+		}
+	}
+}
diff --git a/src/agent/log.v b/src/agent/log.v
new file mode 100644
index 0000000..cd59207
--- /dev/null
+++ b/src/agent/log.v
@@ -0,0 +1,35 @@
+module agent
+
+import log
+
+// log a message with the given level
+pub fn (mut d AgentDaemon) log(msg string, level log.Level) {
+	lock d.logger {
+		d.logger.send_output(msg, level)
+	}
+}
+
+// lfatal create a log message with the fatal level
+pub fn (mut d AgentDaemon) lfatal(msg string) {
+	d.log(msg, log.Level.fatal)
+}
+
+// lerror create a log message with the error level
+pub fn (mut d AgentDaemon) lerror(msg string) {
+	d.log(msg, log.Level.error)
+}
+
+// lwarn create a log message with the warn level
+pub fn (mut d AgentDaemon) lwarn(msg string) {
+	d.log(msg, log.Level.warn)
+}
+
+// linfo create a log message with the info level
+pub fn (mut d AgentDaemon) linfo(msg string) {
+	d.log(msg, log.Level.info)
+}
+
+// ldebug create a log message with the debug level
+pub fn (mut d AgentDaemon) ldebug(msg string) {
+	d.log(msg, log.Level.debug)
+}
diff --git a/src/build/build.v b/src/build/build.v
index 2ad70a6..712c93b 100644
--- a/src/build/build.v
+++ b/src/build/build.v
@@ -1,12 +1,12 @@
 module build
 
-import vieter_v.docker
+import docker
 import encoding.base64
 import time
 import os
 import strings
 import util
-import models { Target }
+import models { BuildConfig, Target }
 
 const (
 	container_build_dir = '/build'
@@ -21,8 +21,8 @@ const (
 // system, install some necessary packages & creates a non-root user to run
 // makepkg with. The base image should be some Linux distribution that uses
 // Pacman as its package manager.
-pub fn create_build_image(base_image string) ?string {
-	mut dd := docker.new_conn()?
+pub fn create_build_image(base_image string) !string {
+	mut dd := docker.new_conn()!
 
 	defer {
 		dd.close() or {}
@@ -57,15 +57,15 @@ pub fn create_build_image(base_image string) ?string {
 	image_tag := if image_parts.len > 1 { image_parts[1] } else { 'latest' }
 
 	// We pull the provided image
-	dd.pull_image(image_name, image_tag)?
+	dd.pull_image(image_name, image_tag)!
 
-	id := dd.container_create(c)?.id
-	// id := docker.create_container(c)?
-	dd.container_start(id)?
+	id := dd.container_create(c)!.id
+	// id := docker.create_container(c)!
+	dd.container_start(id)!
 
 	// This loop waits until the container has stopped, so we can remove it after
 	for {
-		data := dd.container_inspect(id)?
+		data := dd.container_inspect(id)!
 
 		if !data.state.running {
 			break
@@ -79,8 +79,8 @@ pub fn create_build_image(base_image string) ?string {
 	// TODO also add the base image's name into the image name to prevent
 	// conflicts.
 	tag := time.sys_mono_now().str()
-	image := dd.create_image_from_container(id, 'vieter-build', tag)?
-	dd.container_remove(id)?
+	image := dd.create_image_from_container(id, 'vieter-build', tag)!
+	dd.container_remove(id)!
 
 	return image.id
 }
@@ -93,25 +93,32 @@ pub:
 	logs       string
 }
 
-// build_target builds, packages & publishes a given Arch package based on the
+// build_target builds the given target. Internally it calls `build_config`.
+pub fn build_target(address string, api_key string, base_image_id string, target &Target, force bool) !BuildResult {
+	config := target.as_build_config(base_image_id, force)
+
+	return build_config(address, api_key, config)
+}
+
+// build_config builds, packages & publishes a given Arch package based on the
 // provided target. The base image ID should be of an image previously created
 // by create_build_image. It returns the logs of the container.
-pub fn build_target(address string, api_key string, base_image_id string, target &Target) ?BuildResult {
-	mut dd := docker.new_conn()?
+pub fn build_config(address string, api_key string, config BuildConfig) !BuildResult {
+	mut dd := docker.new_conn()!
 
 	defer {
 		dd.close() or {}
 	}
 
 	build_arch := os.uname().machine
-	build_script := create_build_script(address, target, build_arch)
+	build_script := create_build_script(address, config, build_arch)
 
 	// We convert the build script into a base64 string, which then gets passed
 	// to the container as an env var
 	base64_script := base64.encode_str(build_script)
 
 	c := docker.NewContainer{
-		image: '$base_image_id'
+		image: '$config.base_image'
 		env: [
 			'BUILD_SCRIPT=$base64_script',
 			'API_KEY=$api_key',
@@ -125,25 +132,25 @@ pub fn build_target(address string, api_key string, base_image_id string, target
 		user: '0:0'
 	}
 
-	id := dd.container_create(c)?.id
-	dd.container_start(id)?
+	id := dd.container_create(c)!.id
+	dd.container_start(id)!
 
-	mut data := dd.container_inspect(id)?
+	mut data := dd.container_inspect(id)!
 
 	// This loop waits until the container has stopped, so we can remove it after
 	for data.state.running {
 		time.sleep(1 * time.second)
 
-		data = dd.container_inspect(id)?
+		data = dd.container_inspect(id)!
 	}
 
-	mut logs_stream := dd.container_get_logs(id)?
+	mut logs_stream := dd.container_get_logs(id)!
 
 	// Read in the entire stream
 	mut logs_builder := strings.new_builder(10 * 1024)
-	util.reader_to_writer(mut logs_stream, mut logs_builder)?
+	util.reader_to_writer(mut logs_stream, mut logs_builder)!
 
-	dd.container_remove(id)?
+	dd.container_remove(id)!
 
 	return BuildResult{
 		start_time: data.state.start_time
diff --git a/src/build/queue.v b/src/build/queue.v
new file mode 100644
index 0000000..e74529c
--- /dev/null
+++ b/src/build/queue.v
@@ -0,0 +1,220 @@
+module build
+
+import models { BuildConfig, Target }
+import cron.expression { CronExpression, parse_expression }
+import time
+import datatypes { MinHeap }
+import util
+
+struct BuildJob {
+pub mut:
+	// Time at which this build job was created/queued
+	created time.Time
+	// Next timestamp from which point this job is allowed to be executed
+	timestamp time.Time
+	// Required for calculating next timestamp after having pop'ed a job
+	ce CronExpression
+	// Actual build config sent to the agent
+	config BuildConfig
+	// Whether this is a one-time job
+	single bool
+}
+
+// Allows BuildJob structs to be sorted according to their timestamp in
+// MinHeaps
+fn (r1 BuildJob) < (r2 BuildJob) bool {
+	return r1.timestamp < r2.timestamp
+}
+
+// The build job queue is responsible for managing the list of scheduled builds
+// for each architecture. Agents receive jobs from this queue.
+pub struct BuildJobQueue {
+	// Schedule to use for targets without explicitely defined cron expression
+	default_schedule CronExpression
+	// Base image to use for targets without defined base image
+	default_base_image string
+mut:
+	mutex shared util.Dummy
+	// For each architecture, a priority queue is tracked
+	queues map[string]MinHeap<BuildJob>
+	// When a target is removed from the server or edited, its previous build
+	// configs will be invalid. This map allows for those to be simply skipped
+	// by ignoring any build configs created before this timestamp.
+	invalidated map[int]time.Time
+}
+
+// new_job_queue initializes a new job queue
+pub fn new_job_queue(default_schedule CronExpression, default_base_image string) BuildJobQueue {
+	return BuildJobQueue{
+		default_schedule: default_schedule
+		default_base_image: default_base_image
+		invalidated: map[int]time.Time{}
+	}
+}
+
+// insert_all executes insert for each architecture of the given Target.
+pub fn (mut q BuildJobQueue) insert_all(target Target) ! {
+	for arch in target.arch {
+		q.insert(target: target, arch: arch.value)!
+	}
+}
+
+[params]
+pub struct InsertConfig {
+	target Target [required]
+	arch   string [required]
+	single bool
+	force  bool
+	now    bool
+}
+
+// insert a new target's job into the queue for the given architecture. This
+// job will then be endlessly rescheduled after being pop'ed, unless removed
+// explicitely.
+pub fn (mut q BuildJobQueue) insert(input InsertConfig) ! {
+	lock q.mutex {
+		if input.arch !in q.queues {
+			q.queues[input.arch] = MinHeap<BuildJob>{}
+		}
+
+		mut job := BuildJob{
+			created: time.now()
+			single: input.single
+			config: input.target.as_build_config(q.default_base_image, input.force)
+		}
+
+		if !input.now {
+			ce := if input.target.schedule != '' {
+				parse_expression(input.target.schedule) or {
+					return error("Error while parsing cron expression '$input.target.schedule' (id $input.target.id): $err.msg()")
+				}
+			} else {
+				q.default_schedule
+			}
+
+			job.timestamp = ce.next_from_now()!
+			job.ce = ce
+		} else {
+			job.timestamp = time.now()
+		}
+
+		q.queues[input.arch].insert(job)
+	}
+}
+
+// reschedule the given job by calculating the next timestamp and re-adding it
+// to its respective queue. This function is called by the pop functions
+// *after* having pop'ed the job.
+fn (mut q BuildJobQueue) reschedule(job BuildJob, arch string) ! {
+	new_timestamp := job.ce.next_from_now()!
+
+	new_job := BuildJob{
+		...job
+		created: time.now()
+		timestamp: new_timestamp
+	}
+
+	q.queues[arch].insert(new_job)
+}
+
+// pop_invalid pops all invalid jobs.
+fn (mut q BuildJobQueue) pop_invalid(arch string) {
+	for {
+		job := q.queues[arch].peek() or { return }
+
+		if job.config.target_id in q.invalidated
+			&& job.created < q.invalidated[job.config.target_id] {
+			// This pop *should* never fail according to the source code
+			q.queues[arch].pop() or {}
+		} else {
+			break
+		}
+	}
+}
+
+// peek shows the first job for the given architecture that's ready to be
+// executed, if present.
+pub fn (mut q BuildJobQueue) peek(arch string) ?BuildJob {
+	// Even peek requires a write lock, because pop_invalid can modify the data
+	// structure
+	lock q.mutex {
+		if arch !in q.queues {
+			return none
+		}
+
+		q.pop_invalid(arch)
+		job := q.queues[arch].peek()?
+
+		if job.timestamp < time.now() {
+			return job
+		}
+	}
+
+	return none
+}
+
+// pop removes the first job for the given architecture that's ready to be
+// executed from the queue and returns it, if present.
+pub fn (mut q BuildJobQueue) pop(arch string) ?BuildJob {
+	lock q.mutex {
+		if arch !in q.queues {
+			return none
+		}
+
+		q.pop_invalid(arch)
+		mut job := q.queues[arch].peek()?
+
+		if job.timestamp < time.now() {
+			job = q.queues[arch].pop()?
+
+			if !job.single {
+				// TODO how do we handle this properly? Is it even possible for a
+				// cron expression to not return a next time if it's already been
+				// used before?
+				q.reschedule(job, arch) or {}
+			}
+
+			return job
+		}
+	}
+
+	return none
+}
+
+// pop_n tries to pop at most n available jobs for the given architecture.
+pub fn (mut q BuildJobQueue) pop_n(arch string, n int) []BuildJob {
+	lock q.mutex {
+		if arch !in q.queues {
+			return []
+		}
+
+		mut out := []BuildJob{}
+
+		for out.len < n {
+			q.pop_invalid(arch)
+			mut job := q.queues[arch].peek() or { break }
+
+			if job.timestamp < time.now() {
+				job = q.queues[arch].pop() or { break }
+
+				if !job.single {
+					// TODO idem
+					q.reschedule(job, arch) or {}
+				}
+
+				out << job
+			} else {
+				break
+			}
+		}
+
+		return out
+	}
+
+	return []
+}
+
+// invalidate a target's old build jobs.
+pub fn (mut q BuildJobQueue) invalidate(target_id int) {
+	q.invalidated[target_id] = time.now()
+}
diff --git a/src/build/build_script_git.sh b/src/build/scripts/git.sh
similarity index 75%
rename from src/build/build_script_git.sh
rename to src/build/scripts/git.sh
index 73e0965..2644243 100644
--- a/src/build/build_script_git.sh
+++ b/src/build/scripts/git.sh
@@ -16,5 +16,5 @@ echo -e '+ curl -s --head --fail https://example.com/vieter/x86_64/$pkgname-$pkg
 curl -s --head --fail https://example.com/vieter/x86_64/$pkgname-$pkgver-$pkgrel && exit 0
 echo -e '+ [ "$(id -u)" == 0 ] && exit 0'
 [ "$(id -u)" == 0 ] && exit 0
-echo -e '+ MAKEFLAGS="-j$(nproc)" makepkg -s --noconfirm --needed && for pkg in $(ls -1 *.pkg*); do curl -XPOST -T "$pkg" -H "X-API-KEY: $API_KEY" https://example.com/vieter/publish; done'
-MAKEFLAGS="-j$(nproc)" makepkg -s --noconfirm --needed && for pkg in $(ls -1 *.pkg*); do curl -XPOST -T "$pkg" -H "X-API-KEY: $API_KEY" https://example.com/vieter/publish; done
+echo -e '+ MAKEFLAGS="-j$(nproc)" makepkg -s --noconfirm --needed --noextract && for pkg in $(ls -1 *.pkg*); do curl -XPOST -T "$pkg" -H "X-API-KEY: $API_KEY" https://example.com/vieter/publish; done'
+MAKEFLAGS="-j$(nproc)" makepkg -s --noconfirm --needed --noextract && for pkg in $(ls -1 *.pkg*); do curl -XPOST -T "$pkg" -H "X-API-KEY: $API_KEY" https://example.com/vieter/publish; done
diff --git a/src/build/build_script_git_branch.sh b/src/build/scripts/git_branch.sh
similarity index 75%
rename from src/build/build_script_git_branch.sh
rename to src/build/scripts/git_branch.sh
index be1ff4f..9f36bdc 100644
--- a/src/build/build_script_git_branch.sh
+++ b/src/build/scripts/git_branch.sh
@@ -16,5 +16,5 @@ echo -e '+ curl -s --head --fail https://example.com/vieter/x86_64/$pkgname-$pkg
 curl -s --head --fail https://example.com/vieter/x86_64/$pkgname-$pkgver-$pkgrel && exit 0
 echo -e '+ [ "$(id -u)" == 0 ] && exit 0'
 [ "$(id -u)" == 0 ] && exit 0
-echo -e '+ MAKEFLAGS="-j$(nproc)" makepkg -s --noconfirm --needed && for pkg in $(ls -1 *.pkg*); do curl -XPOST -T "$pkg" -H "X-API-KEY: $API_KEY" https://example.com/vieter/publish; done'
-MAKEFLAGS="-j$(nproc)" makepkg -s --noconfirm --needed && for pkg in $(ls -1 *.pkg*); do curl -XPOST -T "$pkg" -H "X-API-KEY: $API_KEY" https://example.com/vieter/publish; done
+echo -e '+ MAKEFLAGS="-j$(nproc)" makepkg -s --noconfirm --needed --noextract && for pkg in $(ls -1 *.pkg*); do curl -XPOST -T "$pkg" -H "X-API-KEY: $API_KEY" https://example.com/vieter/publish; done'
+MAKEFLAGS="-j$(nproc)" makepkg -s --noconfirm --needed --noextract && for pkg in $(ls -1 *.pkg*); do curl -XPOST -T "$pkg" -H "X-API-KEY: $API_KEY" https://example.com/vieter/publish; done
diff --git a/src/build/scripts/git_path.sh b/src/build/scripts/git_path.sh
new file mode 100644
index 0000000..65b7fb9
--- /dev/null
+++ b/src/build/scripts/git_path.sh
@@ -0,0 +1,20 @@
+echo -e '+ echo -e '\''[vieter]\\nServer = https://example.com/$repo/$arch\\nSigLevel = Optional'\'' >> /etc/pacman.conf'
+echo -e '[vieter]\nServer = https://example.com/$repo/$arch\nSigLevel = Optional' >> /etc/pacman.conf
+echo -e '+ pacman -Syu --needed --noconfirm'
+pacman -Syu --needed --noconfirm
+echo -e '+ su builder'
+su builder
+echo -e '+ git clone --single-branch --depth 1 '\''https://examplerepo.com'\'' repo'
+git clone --single-branch --depth 1 'https://examplerepo.com' repo
+echo -e '+ cd '\''repo/example/path'\'''
+cd 'repo/example/path'
+echo -e '+ makepkg --nobuild --syncdeps --needed --noconfirm'
+makepkg --nobuild --syncdeps --needed --noconfirm
+echo -e '+ source PKGBUILD'
+source PKGBUILD
+echo -e '+ curl -s --head --fail https://example.com/vieter/x86_64/$pkgname-$pkgver-$pkgrel && exit 0'
+curl -s --head --fail https://example.com/vieter/x86_64/$pkgname-$pkgver-$pkgrel && exit 0
+echo -e '+ [ "$(id -u)" == 0 ] && exit 0'
+[ "$(id -u)" == 0 ] && exit 0
+echo -e '+ MAKEFLAGS="-j$(nproc)" makepkg -s --noconfirm --needed --noextract && for pkg in $(ls -1 *.pkg*); do curl -XPOST -T "$pkg" -H "X-API-KEY: $API_KEY" https://example.com/vieter/publish; done'
+MAKEFLAGS="-j$(nproc)" makepkg -s --noconfirm --needed --noextract && for pkg in $(ls -1 *.pkg*); do curl -XPOST -T "$pkg" -H "X-API-KEY: $API_KEY" https://example.com/vieter/publish; done
diff --git a/src/build/scripts/git_path_spaces.sh b/src/build/scripts/git_path_spaces.sh
new file mode 100644
index 0000000..b632b91
--- /dev/null
+++ b/src/build/scripts/git_path_spaces.sh
@@ -0,0 +1,20 @@
+echo -e '+ echo -e '\''[vieter]\\nServer = https://example.com/$repo/$arch\\nSigLevel = Optional'\'' >> /etc/pacman.conf'
+echo -e '[vieter]\nServer = https://example.com/$repo/$arch\nSigLevel = Optional' >> /etc/pacman.conf
+echo -e '+ pacman -Syu --needed --noconfirm'
+pacman -Syu --needed --noconfirm
+echo -e '+ su builder'
+su builder
+echo -e '+ git clone --single-branch --depth 1 '\''https://examplerepo.com'\'' repo'
+git clone --single-branch --depth 1 'https://examplerepo.com' repo
+echo -e '+ cd '\''repo/example/path with spaces'\'''
+cd 'repo/example/path with spaces'
+echo -e '+ makepkg --nobuild --syncdeps --needed --noconfirm'
+makepkg --nobuild --syncdeps --needed --noconfirm
+echo -e '+ source PKGBUILD'
+source PKGBUILD
+echo -e '+ curl -s --head --fail https://example.com/vieter/x86_64/$pkgname-$pkgver-$pkgrel && exit 0'
+curl -s --head --fail https://example.com/vieter/x86_64/$pkgname-$pkgver-$pkgrel && exit 0
+echo -e '+ [ "$(id -u)" == 0 ] && exit 0'
+[ "$(id -u)" == 0 ] && exit 0
+echo -e '+ MAKEFLAGS="-j$(nproc)" makepkg -s --noconfirm --needed --noextract && for pkg in $(ls -1 *.pkg*); do curl -XPOST -T "$pkg" -H "X-API-KEY: $API_KEY" https://example.com/vieter/publish; done'
+MAKEFLAGS="-j$(nproc)" makepkg -s --noconfirm --needed --noextract && for pkg in $(ls -1 *.pkg*); do curl -XPOST -T "$pkg" -H "X-API-KEY: $API_KEY" https://example.com/vieter/publish; done
diff --git a/src/build/build_script_url.sh b/src/build/scripts/url.sh
similarity index 75%
rename from src/build/build_script_url.sh
rename to src/build/scripts/url.sh
index 3bc97e1..2d27de7 100644
--- a/src/build/build_script_url.sh
+++ b/src/build/scripts/url.sh
@@ -18,5 +18,5 @@ echo -e '+ curl -s --head --fail https://example.com/vieter/x86_64/$pkgname-$pkg
 curl -s --head --fail https://example.com/vieter/x86_64/$pkgname-$pkgver-$pkgrel && exit 0
 echo -e '+ [ "$(id -u)" == 0 ] && exit 0'
 [ "$(id -u)" == 0 ] && exit 0
-echo -e '+ MAKEFLAGS="-j$(nproc)" makepkg -s --noconfirm --needed && for pkg in $(ls -1 *.pkg*); do curl -XPOST -T "$pkg" -H "X-API-KEY: $API_KEY" https://example.com/vieter/publish; done'
-MAKEFLAGS="-j$(nproc)" makepkg -s --noconfirm --needed && for pkg in $(ls -1 *.pkg*); do curl -XPOST -T "$pkg" -H "X-API-KEY: $API_KEY" https://example.com/vieter/publish; done
+echo -e '+ MAKEFLAGS="-j$(nproc)" makepkg -s --noconfirm --needed --noextract && for pkg in $(ls -1 *.pkg*); do curl -XPOST -T "$pkg" -H "X-API-KEY: $API_KEY" https://example.com/vieter/publish; done'
+MAKEFLAGS="-j$(nproc)" makepkg -s --noconfirm --needed --noextract && for pkg in $(ls -1 *.pkg*); do curl -XPOST -T "$pkg" -H "X-API-KEY: $API_KEY" https://example.com/vieter/publish; done
diff --git a/src/build/shell.v b/src/build/shell.v
index e573d53..16f93b5 100644
--- a/src/build/shell.v
+++ b/src/build/shell.v
@@ -1,6 +1,6 @@
 module build
 
-import models { Target }
+import models { BuildConfig }
 
 // escape_shell_string escapes any characters that could be interpreted
 // incorrectly by a shell. The resulting value should be safe to use inside an
@@ -23,13 +23,13 @@ pub fn echo_commands(cmds []string) []string {
 }
 
 // create_build_script generates a shell script that builds a given Target.
-fn create_build_script(address string, target &Target, build_arch string) string {
-	repo_url := '$address/$target.repo'
+fn create_build_script(address string, config BuildConfig, build_arch string) string {
+	repo_url := '$address/$config.repo'
 
 	mut commands := [
 		// This will later be replaced by a proper setting for changing the
 		// mirrorlist
-		"echo -e '[$target.repo]\\nServer = $address/\$repo/\$arch\\nSigLevel = Optional' >> /etc/pacman.conf"
+		"echo -e '[$config.repo]\\nServer = $address/\$repo/\$arch\\nSigLevel = Optional' >> /etc/pacman.conf"
 		// We need to update the package list of the repo we just added above.
 		// This should however not pull in a lot of packages as long as the
 		// builder image is rebuilt frequently.
@@ -38,22 +38,22 @@ fn create_build_script(address string, target &Target, build_arch string) string
 		'su builder',
 	]
 
-	commands << match target.kind {
+	commands << match config.kind {
 		'git' {
-			if target.branch == '' {
+			if config.branch == '' {
 				[
-					"git clone --single-branch --depth 1 '$target.url' repo",
+					"git clone --single-branch --depth 1 '$config.url' repo",
 				]
 			} else {
 				[
-					"git clone --single-branch --depth 1 --branch $target.branch '$target.url' repo",
+					"git clone --single-branch --depth 1 --branch $config.branch '$config.url' repo",
 				]
 			}
 		}
 		'url' {
 			[
 				'mkdir repo',
-				"curl -o repo/PKGBUILD -L '$target.url'",
+				"curl -o repo/PKGBUILD -L '$config.url'",
 			]
 		}
 		else {
@@ -61,19 +61,32 @@ fn create_build_script(address string, target &Target, build_arch string) string
 		}
 	}
 
+	commands << if config.path != '' {
+		"cd 'repo/$config.path'"
+	} else {
+		'cd repo'
+	}
+
 	commands << [
-		'cd repo',
 		'makepkg --nobuild --syncdeps --needed --noconfirm',
 		'source PKGBUILD',
+	]
+
+	if !config.force {
 		// The build container checks whether the package is already present on
 		// the server.
-		'curl -s --head --fail $repo_url/$build_arch/\$pkgname-\$pkgver-\$pkgrel && exit 0',
-		// If the above curl command succeeds, we don't need to rebuild the
-		// package. However, because we're in a su shell, the exit command will
-		// drop us back into the root shell. Therefore, we must check whether
-		// we're in root so we don't proceed.
-		'[ "\$(id -u)" == 0 ] && exit 0',
-		'MAKEFLAGS="-j\$(nproc)" makepkg -s --noconfirm --needed && for pkg in \$(ls -1 *.pkg*); do curl -XPOST -T "\$pkg" -H "X-API-KEY: \$API_KEY" $repo_url/publish; done',
+		commands << [
+			'curl -s --head --fail $repo_url/$build_arch/\$pkgname-\$pkgver-\$pkgrel && exit 0',
+			// If the above curl command succeeds, we don't need to rebuild the
+			// package. However, because we're in a su shell, the exit command will
+			// drop us back into the root shell. Therefore, we must check whether
+			// we're in root so we don't proceed.
+			'[ "\$(id -u)" == 0 ] && exit 0',
+		]
+	}
+
+	commands << [
+		'MAKEFLAGS="-j\$(nproc)" makepkg -s --noconfirm --needed --noextract && for pkg in \$(ls -1 *.pkg*); do curl -XPOST -T "\$pkg" -H "X-API-KEY: \$API_KEY" $repo_url/publish; done',
 	]
 
 	return echo_commands(commands).join('\n')
diff --git a/src/build/shell_test.v b/src/build/shell_test.v
index 341df88..e23d964 100644
--- a/src/build/shell_test.v
+++ b/src/build/shell_test.v
@@ -1,43 +1,75 @@
 module build
 
-import models { Target }
+import models { BuildConfig }
 
-fn test_create_build_script_git_branch() {
-	target := Target{
-		id: 1
+fn test_create_build_script_git() {
+	config := BuildConfig{
+		target_id: 1
 		kind: 'git'
 		url: 'https://examplerepo.com'
-		branch: 'main'
 		repo: 'vieter'
+		base_image: 'not-used:latest'
 	}
-	build_script := create_build_script('https://example.com', target, 'x86_64')
-	expected := $embed_file('build_script_git_branch.sh')
+
+	build_script := create_build_script('https://example.com', config, 'x86_64')
+	expected := $embed_file('scripts/git.sh')
 
 	assert build_script == expected.to_string().trim_space()
 }
 
-fn test_create_build_script_git() {
-	target := Target{
-		id: 1
+fn test_create_build_script_git_path() {
+	mut config := BuildConfig{
+		target_id: 1
 		kind: 'git'
 		url: 'https://examplerepo.com'
 		repo: 'vieter'
+		path: 'example/path'
+		base_image: 'not-used:latest'
 	}
-	build_script := create_build_script('https://example.com', target, 'x86_64')
-	expected := $embed_file('build_script_git.sh')
+
+	mut build_script := create_build_script('https://example.com', config, 'x86_64')
+	mut expected := $embed_file('scripts/git_path.sh')
+
+	assert build_script == expected.to_string().trim_space()
+
+	config = BuildConfig{
+		...config
+		path: 'example/path with spaces'
+	}
+
+	build_script = create_build_script('https://example.com', config, 'x86_64')
+	expected = $embed_file('scripts/git_path_spaces.sh')
+
+	assert build_script == expected.to_string().trim_space()
+}
+
+fn test_create_build_script_git_branch() {
+	config := BuildConfig{
+		target_id: 1
+		kind: 'git'
+		url: 'https://examplerepo.com'
+		branch: 'main'
+		repo: 'vieter'
+		base_image: 'not-used:latest'
+	}
+
+	build_script := create_build_script('https://example.com', config, 'x86_64')
+	expected := $embed_file('scripts/git_branch.sh')
 
 	assert build_script == expected.to_string().trim_space()
 }
 
 fn test_create_build_script_url() {
-	target := Target{
-		id: 1
+	config := BuildConfig{
+		target_id: 1
 		kind: 'url'
 		url: 'https://examplerepo.com'
 		repo: 'vieter'
+		base_image: 'not-used:latest'
 	}
-	build_script := create_build_script('https://example.com', target, 'x86_64')
-	expected := $embed_file('build_script_url.sh')
+
+	build_script := create_build_script('https://example.com', config, 'x86_64')
+	expected := $embed_file('scripts/url.sh')
 
 	assert build_script == expected.to_string().trim_space()
 }
diff --git a/src/client/client.v b/src/client/client.v
index d68ff18..cce4e70 100644
--- a/src/client/client.v
+++ b/src/client/client.v
@@ -2,7 +2,7 @@ module client
 
 import net.http { Method }
 import net.urllib
-import web.response { Response }
+import web.response { Response, new_data_response }
 import json
 
 pub struct Client {
@@ -21,7 +21,7 @@ pub fn new(address string, api_key string) Client {
 
 // send_request_raw sends an HTTP request, returning the http.Response object.
 // It encodes the params so that they're safe to pass as HTTP query parameters.
-fn (c &Client) send_request_raw(method Method, url string, params map[string]string, body string) ?http.Response {
+fn (c &Client) send_request_raw(method Method, url string, params map[string]string, body string) !http.Response {
 	mut full_url := '$c.address$url'
 
 	if params.len > 0 {
@@ -38,31 +38,53 @@ fn (c &Client) send_request_raw(method Method, url string, params map[string]str
 		full_url = '$full_url?$params_str'
 	}
 
-	mut req := http.new_request(method, full_url, body)?
-	req.add_custom_header('X-Api-Key', c.api_key)?
+	// Looking at the source code, this function doesn't actually fail, so I'm
+	// not sure why it returns an optional
+	mut req := http.new_request(method, full_url, body) or { return error('') }
+	req.add_custom_header('X-Api-Key', c.api_key)!
 
-	res := req.do()?
+	res := req.do()!
 
 	return res
 }
 
 // send_request<T> just calls send_request_with_body<T> with an empty body.
-fn (c &Client) send_request<T>(method Method, url string, params map[string]string) ?Response<T> {
+fn (c &Client) send_request<T>(method Method, url string, params map[string]string) !Response<T> {
 	return c.send_request_with_body<T>(method, url, params, '')
 }
 
 // send_request_with_body<T> calls send_request_raw_response & parses its
 // output as a Response<T> object.
-fn (c &Client) send_request_with_body<T>(method Method, url string, params map[string]string, body string) ?Response<T> {
-	res_text := c.send_request_raw_response(method, url, params, body)?
-	data := json.decode(Response<T>, res_text)?
+fn (c &Client) send_request_with_body<T>(method Method, url string, params map[string]string, body string) !Response<T> {
+	res := c.send_request_raw(method, url, params, body)!
+	status := res.status()
+
+	// Non-successful requests are expected to return either an empty body or
+	// Response<string>
+	if status.is_error() {
+		// A non-successful status call will have an empty body
+		if res.body == '' {
+			return error('Error $res.status_code ($status.str()): (empty response)')
+		}
+
+		data := json.decode(Response<string>, res.body)!
+
+		return error('Status $res.status_code ($status.str()): $data.message')
+	}
+
+	// Just return an empty successful response
+	if res.body == '' {
+		return new_data_response(T{})
+	}
+
+	data := json.decode(Response<T>, res.body)!
 
 	return data
 }
 
 // send_request_raw_response returns the raw text response for an HTTP request.
-fn (c &Client) send_request_raw_response(method Method, url string, params map[string]string, body string) ?string {
-	res := c.send_request_raw(method, url, params, body)?
+fn (c &Client) send_request_raw_response(method Method, url string, params map[string]string, body string) !string {
+	res := c.send_request_raw(method, url, params, body)!
 
 	return res.body
 }
diff --git a/src/client/jobs.v b/src/client/jobs.v
new file mode 100644
index 0000000..784639e
--- /dev/null
+++ b/src/client/jobs.v
@@ -0,0 +1,23 @@
+module client
+
+import models { BuildConfig }
+
+// poll_jobs requests a list of new build jobs from the server.
+pub fn (c &Client) poll_jobs(arch string, max int) ![]BuildConfig {
+	data := c.send_request<[]BuildConfig>(.get, '/api/v1/jobs/poll', {
+		'arch': arch
+		'max':  max.str()
+	})!
+
+	return data.data
+}
+
+// queue_job adds a new one-time build job for the given target to the job
+// queue.
+pub fn (c &Client) queue_job(target_id int, arch string, force bool) ! {
+	c.send_request<string>(.post, '/api/v1/jobs/queue', {
+		'target': target_id.str()
+		'arch':   arch
+		'force':  force.str()
+	})!
+}
diff --git a/src/client/logs.v b/src/client/logs.v
index b414245..85063bc 100644
--- a/src/client/logs.v
+++ b/src/client/logs.v
@@ -6,40 +6,29 @@ import web.response { Response }
 import time
 
 // get_build_logs returns all build logs.
-pub fn (c &Client) get_build_logs(filter BuildLogFilter) ?Response<[]BuildLog> {
+pub fn (c &Client) get_build_logs(filter BuildLogFilter) ![]BuildLog {
 	params := models.params_from(filter)
-	data := c.send_request<[]BuildLog>(Method.get, '/api/v1/logs', params)?
+	data := c.send_request<[]BuildLog>(Method.get, '/api/v1/logs', params)!
 
-	return data
-}
-
-// get_build_logs_for_target returns all build logs for a given target.
-pub fn (c &Client) get_build_logs_for_target(target_id int) ?Response<[]BuildLog> {
-	params := {
-		'repo': target_id.str()
-	}
-
-	data := c.send_request<[]BuildLog>(Method.get, '/api/v1/logs', params)?
-
-	return data
+	return data.data
 }
 
 // get_build_log returns a specific build log.
-pub fn (c &Client) get_build_log(id int) ?Response<BuildLog> {
-	data := c.send_request<BuildLog>(Method.get, '/api/v1/logs/$id', {})?
+pub fn (c &Client) get_build_log(id int) !BuildLog {
+	data := c.send_request<BuildLog>(Method.get, '/api/v1/logs/$id', {})!
 
-	return data
+	return data.data
 }
 
 // get_build_log_content returns the contents of the build log file.
-pub fn (c &Client) get_build_log_content(id int) ?string {
-	data := c.send_request_raw_response(Method.get, '/api/v1/logs/$id/content', {}, '')?
+pub fn (c &Client) get_build_log_content(id int) !string {
+	data := c.send_request_raw_response(Method.get, '/api/v1/logs/$id/content', {}, '')!
 
 	return data
 }
 
 // add_build_log adds a new build log to the server.
-pub fn (c &Client) add_build_log(target_id int, start_time time.Time, end_time time.Time, arch string, exit_code int, content string) ?Response<int> {
+pub fn (c &Client) add_build_log(target_id int, start_time time.Time, end_time time.Time, arch string, exit_code int, content string) !Response<int> {
 	params := {
 		'target':    target_id.str()
 		'startTime': start_time.unix_time().str()
@@ -48,7 +37,7 @@ pub fn (c &Client) add_build_log(target_id int, start_time time.Time, end_time t
 		'exitCode':  exit_code.str()
 	}
 
-	data := c.send_request_with_body<int>(Method.post, '/api/v1/logs', params, content)?
+	data := c.send_request_with_body<int>(Method.post, '/api/v1/logs', params, content)!
 
 	return data
 }
diff --git a/src/client/targets.v b/src/client/targets.v
index c5e44fe..da6a9e4 100644
--- a/src/client/targets.v
+++ b/src/client/targets.v
@@ -2,24 +2,23 @@ module client
 
 import models { Target, TargetFilter }
 import net.http { Method }
-import web.response { Response }
 
 // get_targets returns a list of targets, given a filter object.
-pub fn (c &Client) get_targets(filter TargetFilter) ?[]Target {
+pub fn (c &Client) get_targets(filter TargetFilter) ![]Target {
 	params := models.params_from(filter)
-	data := c.send_request<[]Target>(Method.get, '/api/v1/targets', params)?
+	data := c.send_request<[]Target>(Method.get, '/api/v1/targets', params)!
 
 	return data.data
 }
 
 // get_all_targets retrieves *all* targs from the API using the default
 // limit.
-pub fn (c &Client) get_all_targets() ?[]Target {
+pub fn (c &Client) get_all_targets() ![]Target {
 	mut targets := []Target{}
 	mut offset := u64(0)
 
 	for {
-		sub_targets := c.get_targets(offset: offset)?
+		sub_targets := c.get_targets(offset: offset)!
 
 		if sub_targets.len == 0 {
 			break
@@ -34,8 +33,8 @@ pub fn (c &Client) get_all_targets() ?[]Target {
 }
 
 // get_target returns the target for a specific id.
-pub fn (c &Client) get_target(id int) ?Target {
-	data := c.send_request<Target>(Method.get, '/api/v1/targets/$id', {})?
+pub fn (c &Client) get_target(id int) !Target {
+	data := c.send_request<Target>(Method.get, '/api/v1/targets/$id', {})!
 
 	return data.data
 }
@@ -45,28 +44,29 @@ pub struct NewTarget {
 	url    string
 	branch string
 	repo   string
+	path   string
 	arch   []string
 }
 
 // add_target adds a new target to the server.
-pub fn (c &Client) add_target(t NewTarget) ?Response<int> {
+pub fn (c &Client) add_target(t NewTarget) !int {
 	params := models.params_from<NewTarget>(t)
-	data := c.send_request<int>(Method.post, '/api/v1/targets', params)?
+	data := c.send_request<int>(Method.post, '/api/v1/targets', params)!
 
-	return data
+	return data.data
 }
 
 // remove_target removes the target with the given id from the server.
-pub fn (c &Client) remove_target(id int) ?Response<string> {
-	data := c.send_request<string>(Method.delete, '/api/v1/targets/$id', {})?
+pub fn (c &Client) remove_target(id int) !string {
+	data := c.send_request<string>(Method.delete, '/api/v1/targets/$id', {})!
 
-	return data
+	return data.data
 }
 
 // patch_target sends a PATCH request to the given target with the params as
 // payload.
-pub fn (c &Client) patch_target(id int, params map[string]string) ?Response<string> {
-	data := c.send_request<string>(Method.patch, '/api/v1/targets/$id', params)?
+pub fn (c &Client) patch_target(id int, params map[string]string) !string {
+	data := c.send_request<string>(Method.patch, '/api/v1/targets/$id', params)!
 
-	return data
+	return data.data
 }
diff --git a/src/console/aur/aur.v b/src/console/aur/aur.v
index c98f8e6..a6a3324 100644
--- a/src/console/aur/aur.v
+++ b/src/console/aur/aur.v
@@ -3,8 +3,8 @@ module aur
 import cli
 import console
 import client
-import vieter_v.aur
-import vieter_v.conf as vconf
+import aur
+import conf as vconf
 
 struct Config {
 	address string [required]
@@ -21,12 +21,12 @@ pub fn cmd() cli.Command {
 				name: 'search'
 				description: 'Search for packages.'
 				required_args: 1
-				execute: fn (cmd cli.Command) ? {
+				execute: fn (cmd cli.Command) ! {
 					c := aur.new()
-					pkgs := c.search(cmd.args[0])?
+					pkgs := c.search(cmd.args[0])!
 					data := pkgs.map([it.name, it.description])
 
-					println(console.pretty_table(['name', 'description'], data)?)
+					println(console.pretty_table(['name', 'description'], data)!)
 				}
 			},
 			cli.Command{
@@ -34,12 +34,12 @@ pub fn cmd() cli.Command {
 				usage: 'repo pkg-name [pkg-name...]'
 				description: 'Add the given AUR package(s) to Vieter. Non-existent packages will be silently ignored.'
 				required_args: 2
-				execute: fn (cmd cli.Command) ? {
-					config_file := cmd.flags.get_string('config-file')?
-					conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)?
+				execute: fn (cmd cli.Command) ! {
+					config_file := cmd.flags.get_string('config-file')!
+					conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)!
 
 					c := aur.new()
-					pkgs := c.info(cmd.args[1..])?
+					pkgs := c.info(cmd.args[1..])!
 
 					vc := client.new(conf.address, conf.api_key)
 
diff --git a/src/console/console.v b/src/console/console.v
index caf4cca..5c40de8 100644
--- a/src/console/console.v
+++ b/src/console/console.v
@@ -13,7 +13,7 @@ pub fn tabbed_table(data [][]string) string {
 // pretty_table converts a list of string data into a pretty table. Many thanks
 // to @hungrybluedev in the Vlang Discord for providing this code!
 // https://ptb.discord.com/channels/592103645835821068/592106336838352923/970278787143045192
-pub fn pretty_table(header []string, data [][]string) ?string {
+pub fn pretty_table(header []string, data [][]string) !string {
 	column_count := header.len
 
 	mut column_widths := []int{len: column_count, init: header[it].len}
@@ -26,7 +26,7 @@ pub fn pretty_table(header []string, data [][]string) ?string {
 		}
 	}
 
-	single_line_length := arrays.sum(column_widths)? + (column_count + 1) * 3 - 4
+	single_line_length := arrays.sum(column_widths)! + (column_count + 1) * 3 - 4
 
 	horizontal_line := '+' + strings.repeat(`-`, single_line_length) + '+'
 	mut buffer := strings.new_builder(data.len * single_line_length)
@@ -64,12 +64,12 @@ pub fn pretty_table(header []string, data [][]string) ?string {
 
 // export_man_pages recursively generates all man pages for the given
 // cli.Command & writes them to the given directory.
-pub fn export_man_pages(cmd cli.Command, path string) ? {
+pub fn export_man_pages(cmd cli.Command, path string) ! {
 	man := cmd.manpage()
 	os.write_file(os.join_path_single(path, cmd.full_name().replace(' ', '-') + '.1'),
-		man)?
+		man)!
 
 	for sub_cmd in cmd.commands {
-		export_man_pages(sub_cmd, path)?
+		export_man_pages(sub_cmd, path)!
 	}
 }
diff --git a/src/console/logs/logs.v b/src/console/logs/logs.v
index 41830c2..3064a58 100644
--- a/src/console/logs/logs.v
+++ b/src/console/logs/logs.v
@@ -1,7 +1,7 @@
 module logs
 
 import cli
-import vieter_v.conf as vconf
+import conf as vconf
 import client
 import console
 import time
@@ -63,30 +63,30 @@ pub fn cmd() cli.Command {
 						flag: cli.FlagType.string
 					},
 				]
-				execute: fn (cmd cli.Command) ? {
-					config_file := cmd.flags.get_string('config-file')?
-					conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)?
+				execute: fn (cmd cli.Command) ! {
+					config_file := cmd.flags.get_string('config-file')!
+					conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)!
 
 					mut filter := BuildLogFilter{}
 
-					limit := cmd.flags.get_int('limit')?
+					limit := cmd.flags.get_int('limit')!
 					if limit != 0 {
 						filter.limit = u64(limit)
 					}
 
-					offset := cmd.flags.get_int('offset')?
+					offset := cmd.flags.get_int('offset')!
 					if offset != 0 {
 						filter.offset = u64(offset)
 					}
 
-					target_id := cmd.flags.get_int('target')?
+					target_id := cmd.flags.get_int('target')!
 					if target_id != 0 {
 						filter.target = target_id
 					}
 
 					tz_offset := time.offset()
 
-					if cmd.flags.get_bool('today')? {
+					if cmd.flags.get_bool('today')! {
 						today := time.now()
 
 						filter.after = time.new_time(time.Time{
@@ -98,12 +98,12 @@ pub fn cmd() cli.Command {
 					}
 					// The -today flag overwrites any of the other date flags.
 					else {
-						day_str := cmd.flags.get_string('day')?
-						before_str := cmd.flags.get_string('before')?
-						after_str := cmd.flags.get_string('after')?
+						day_str := cmd.flags.get_string('day')!
+						before_str := cmd.flags.get_string('before')!
+						after_str := cmd.flags.get_string('after')!
 
 						if day_str != '' {
-							day := time.parse_rfc3339(day_str)?
+							day := time.parse_rfc3339(day_str)!
 							day_utc := time.new_time(time.Time{
 								year: day.year
 								month: day.month
@@ -118,24 +118,24 @@ pub fn cmd() cli.Command {
 							filter.before = day_utc.add_days(1)
 						} else {
 							if before_str != '' {
-								filter.before = time.parse(before_str)?.add_seconds(-tz_offset)
+								filter.before = time.parse(before_str)!.add_seconds(-tz_offset)
 							}
 
 							if after_str != '' {
-								filter.after = time.parse(after_str)?.add_seconds(-tz_offset)
+								filter.after = time.parse(after_str)!.add_seconds(-tz_offset)
 							}
 						}
 					}
 
-					if cmd.flags.get_bool('failed')? {
+					if cmd.flags.get_bool('failed')! {
 						filter.exit_codes = [
 							'!0',
 						]
 					}
 
-					raw := cmd.flags.get_bool('raw')?
+					raw := cmd.flags.get_bool('raw')!
 
-					list(conf, filter, raw)?
+					list(conf, filter, raw)!
 				}
 			},
 			cli.Command{
@@ -143,12 +143,12 @@ pub fn cmd() cli.Command {
 				required_args: 1
 				usage: 'id'
 				description: 'Show all info for a specific build log.'
-				execute: fn (cmd cli.Command) ? {
-					config_file := cmd.flags.get_string('config-file')?
-					conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)?
+				execute: fn (cmd cli.Command) ! {
+					config_file := cmd.flags.get_string('config-file')!
+					conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)!
 
 					id := cmd.args[0].int()
-					info(conf, id)?
+					info(conf, id)!
 				}
 			},
 			cli.Command{
@@ -156,12 +156,12 @@ pub fn cmd() cli.Command {
 				required_args: 1
 				usage: 'id'
 				description: 'Output the content of a build log to stdout.'
-				execute: fn (cmd cli.Command) ? {
-					config_file := cmd.flags.get_string('config-file')?
-					conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)?
+				execute: fn (cmd cli.Command) ! {
+					config_file := cmd.flags.get_string('config-file')!
+					conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)!
 
 					id := cmd.args[0].int()
-					content(conf, id)?
+					content(conf, id)!
 				}
 			},
 		]
@@ -169,46 +169,38 @@ pub fn cmd() cli.Command {
 }
 
 // print_log_list prints a list of logs.
-fn print_log_list(logs []BuildLog, raw bool) ? {
+fn print_log_list(logs []BuildLog, raw bool) ! {
 	data := logs.map([it.id.str(), it.target_id.str(), it.start_time.local().str(),
 		it.exit_code.str()])
 
 	if raw {
 		println(console.tabbed_table(data))
 	} else {
-		println(console.pretty_table(['id', 'target', 'start time', 'exit code'], data)?)
+		println(console.pretty_table(['id', 'target', 'start time', 'exit code'], data)!)
 	}
 }
 
 // list prints a list of all build logs.
-fn list(conf Config, filter BuildLogFilter, raw bool) ? {
+fn list(conf Config, filter BuildLogFilter, raw bool) ! {
 	c := client.new(conf.address, conf.api_key)
-	logs := c.get_build_logs(filter)?.data
+	logs := c.get_build_logs(filter)!
 
-	print_log_list(logs, raw)?
-}
-
-// list prints a list of all build logs for a given target.
-fn list_for_target(conf Config, target_id int, raw bool) ? {
-	c := client.new(conf.address, conf.api_key)
-	logs := c.get_build_logs_for_target(target_id)?.data
-
-	print_log_list(logs, raw)?
+	print_log_list(logs, raw)!
 }
 
 // info print the detailed info for a given build log.
-fn info(conf Config, id int) ? {
+fn info(conf Config, id int) ! {
 	c := client.new(conf.address, conf.api_key)
-	log := c.get_build_log(id)?.data
+	log := c.get_build_log(id)!
 
 	print(log)
 }
 
 // content outputs the contents of the log file for a given build log to
 // stdout.
-fn content(conf Config, id int) ? {
+fn content(conf Config, id int) ! {
 	c := client.new(conf.address, conf.api_key)
-	content := c.get_build_log_content(id)?
+	content := c.get_build_log_content(id)!
 
 	println(content)
 }
diff --git a/src/console/man/man.v b/src/console/man/man.v
index d91a140..22cb5f7 100644
--- a/src/console/man/man.v
+++ b/src/console/man/man.v
@@ -11,11 +11,11 @@ pub fn cmd() cli.Command {
 		description: 'Generate all man pages & save them in the given directory.'
 		usage: 'dir'
 		required_args: 1
-		execute: fn (cmd cli.Command) ? {
+		execute: fn (cmd cli.Command) ! {
 			root := cmd.root()
-			os.mkdir_all(cmd.args[0])?
+			os.mkdir_all(cmd.args[0])!
 
-			console.export_man_pages(root, cmd.args[0])?
+			console.export_man_pages(root, cmd.args[0])!
 		}
 	}
 }
diff --git a/src/console/schedule/schedule.v b/src/console/schedule/schedule.v
index 8fceddd..7ce0516 100644
--- a/src/console/schedule/schedule.v
+++ b/src/console/schedule/schedule.v
@@ -18,11 +18,11 @@ pub fn cmd() cli.Command {
 				default_value: ['5']
 			},
 		]
-		execute: fn (cmd cli.Command) ? {
-			ce := parse_expression(cmd.args.join(' '))?
-			count := cmd.flags.get_int('count')?
+		execute: fn (cmd cli.Command) ! {
+			ce := parse_expression(cmd.args.join(' '))!
+			count := cmd.flags.get_int('count')!
 
-			for t in ce.next_n(time.now(), count)? {
+			for t in ce.next_n(time.now(), count)! {
 				println(t)
 			}
 		}
diff --git a/src/console/targets/build.v b/src/console/targets/build.v
index 6337aa3..e18077d 100644
--- a/src/console/targets/build.v
+++ b/src/console/targets/build.v
@@ -1,34 +1,34 @@
 module targets
 
 import client
-import vieter_v.docker
+import docker
 import os
 import build
 
 // build locally builds the target with the given id.
-fn build(conf Config, target_id int) ? {
+fn build(conf Config, target_id int, force bool) ! {
 	c := client.new(conf.address, conf.api_key)
-	target := c.get_target(target_id)?
+	target := c.get_target(target_id)!
 
 	build_arch := os.uname().machine
 
 	println('Creating base image...')
-	image_id := build.create_build_image(conf.base_image)?
+	image_id := build.create_build_image(conf.base_image)!
 
 	println('Running build...')
-	res := build.build_target(conf.address, conf.api_key, image_id, target)?
+	res := build.build_target(conf.address, conf.api_key, image_id, target, force)!
 
 	println('Removing build image...')
 
-	mut dd := docker.new_conn()?
+	mut dd := docker.new_conn()!
 
 	defer {
 		dd.close() or {}
 	}
 
-	dd.remove_image(image_id)?
+	dd.remove_image(image_id)!
 
 	println('Uploading logs to Vieter...')
 	c.add_build_log(target.id, res.start_time, res.end_time, build_arch, res.exit_code,
-		res.logs)?
+		res.logs)!
 }
diff --git a/src/console/targets/targets.v b/src/console/targets/targets.v
index 5640011..94deebd 100644
--- a/src/console/targets/targets.v
+++ b/src/console/targets/targets.v
@@ -1,7 +1,7 @@
 module targets
 
 import cli
-import vieter_v.conf as vconf
+import conf as vconf
 import cron.expression { parse_expression }
 import client { NewTarget }
 import console
@@ -13,7 +13,7 @@ struct Config {
 	base_image string = 'archlinux:base-devel'
 }
 
-// cmd returns the cli submodule that handles the repos API interaction
+// cmd returns the cli submodule that handles the targets API interaction
 pub fn cmd() cli.Command {
 	return cli.Command{
 		name: 'targets'
@@ -39,30 +39,30 @@ pub fn cmd() cli.Command {
 						flag: cli.FlagType.string
 					},
 				]
-				execute: fn (cmd cli.Command) ? {
-					config_file := cmd.flags.get_string('config-file')?
-					conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)?
+				execute: fn (cmd cli.Command) ! {
+					config_file := cmd.flags.get_string('config-file')!
+					conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)!
 
 					mut filter := TargetFilter{}
 
-					limit := cmd.flags.get_int('limit')?
+					limit := cmd.flags.get_int('limit')!
 					if limit != 0 {
 						filter.limit = u64(limit)
 					}
 
-					offset := cmd.flags.get_int('offset')?
+					offset := cmd.flags.get_int('offset')!
 					if offset != 0 {
 						filter.offset = u64(offset)
 					}
 
-					repo := cmd.flags.get_string('repo')?
+					repo := cmd.flags.get_string('repo')!
 					if repo != '' {
 						filter.repo = repo
 					}
 
-					raw := cmd.flags.get_bool('raw')?
+					raw := cmd.flags.get_bool('raw')!
 
-					list(conf, filter, raw)?
+					list(conf, filter, raw)!
 				}
 			},
 			cli.Command{
@@ -82,21 +82,27 @@ pub fn cmd() cli.Command {
 						description: "Which branch to clone; only applies to kind 'git'."
 						flag: cli.FlagType.string
 					},
+					cli.Flag{
+						name: 'path'
+						description: 'Subdirectory inside Git repository to use.'
+						flag: cli.FlagType.string
+					},
 				]
-				execute: fn (cmd cli.Command) ? {
-					config_file := cmd.flags.get_string('config-file')?
-					conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)?
+				execute: fn (cmd cli.Command) ! {
+					config_file := cmd.flags.get_string('config-file')!
+					conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)!
 
 					t := NewTarget{
-						kind: cmd.flags.get_string('kind')?
+						kind: cmd.flags.get_string('kind')!
 						url: cmd.args[0]
 						repo: cmd.args[1]
 						branch: cmd.flags.get_string('branch') or { '' }
+						path: cmd.flags.get_string('path') or { '' }
 					}
 
-					raw := cmd.flags.get_bool('raw')?
+					raw := cmd.flags.get_bool('raw')!
 
-					add(conf, t, raw)?
+					add(conf, t, raw)!
 				}
 			},
 			cli.Command{
@@ -104,11 +110,11 @@ pub fn cmd() cli.Command {
 				required_args: 1
 				usage: 'id'
 				description: 'Remove a target that matches the given id.'
-				execute: fn (cmd cli.Command) ? {
-					config_file := cmd.flags.get_string('config-file')?
-					conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)?
+				execute: fn (cmd cli.Command) ! {
+					config_file := cmd.flags.get_string('config-file')!
+					conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)!
 
-					remove(conf, cmd.args[0])?
+					remove(conf, cmd.args[0])!
 				}
 			},
 			cli.Command{
@@ -116,11 +122,11 @@ pub fn cmd() cli.Command {
 				required_args: 1
 				usage: 'id'
 				description: 'Show detailed information for the target matching the id.'
-				execute: fn (cmd cli.Command) ? {
-					config_file := cmd.flags.get_string('config-file')?
-					conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)?
+				execute: fn (cmd cli.Command) ! {
+					config_file := cmd.flags.get_string('config-file')!
+					conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)!
 
-					info(conf, cmd.args[0])?
+					info(conf, cmd.args[0])!
 				}
 			},
 			cli.Command{
@@ -159,10 +165,15 @@ pub fn cmd() cli.Command {
 						description: 'Kind of target.'
 						flag: cli.FlagType.string
 					},
+					cli.Flag{
+						name: 'path'
+						description: 'Subdirectory inside Git repository to use.'
+						flag: cli.FlagType.string
+					},
 				]
-				execute: fn (cmd cli.Command) ? {
-					config_file := cmd.flags.get_string('config-file')?
-					conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)?
+				execute: fn (cmd cli.Command) ! {
+					config_file := cmd.flags.get_string('config-file')!
+					conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)!
 
 					found := cmd.flags.get_all_found()
 
@@ -170,11 +181,11 @@ pub fn cmd() cli.Command {
 
 					for f in found {
 						if f.name != 'config-file' {
-							params[f.name] = f.get_string()?
+							params[f.name] = f.get_string()!
 						}
 					}
 
-					patch(conf, cmd.args[0], params)?
+					patch(conf, cmd.args[0], params)!
 				}
 			},
 			cli.Command{
@@ -182,58 +193,82 @@ pub fn cmd() cli.Command {
 				required_args: 1
 				usage: 'id'
 				description: 'Build the target with the given id & publish it.'
-				execute: fn (cmd cli.Command) ? {
-					config_file := cmd.flags.get_string('config-file')?
-					conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)?
+				flags: [
+					cli.Flag{
+						name: 'force'
+						description: 'Build the target without checking whether it needs to be renewed.'
+						flag: cli.FlagType.bool
+					},
+					cli.Flag{
+						name: 'remote'
+						description: 'Schedule the build on the server instead of running it locally.'
+						flag: cli.FlagType.bool
+					},
+					cli.Flag{
+						name: 'arch'
+						description: 'Architecture to schedule build for. Required when using -remote.'
+						flag: cli.FlagType.string
+					},
+				]
+				execute: fn (cmd cli.Command) ! {
+					config_file := cmd.flags.get_string('config-file')!
+					conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)!
 
-					build(conf, cmd.args[0].int())?
+					remote := cmd.flags.get_bool('remote')!
+					force := cmd.flags.get_bool('force')!
+					target_id := cmd.args[0].int()
+
+					if remote {
+						arch := cmd.flags.get_string('arch')!
+
+						if arch == '' {
+							return error('When scheduling the build remotely, you have to specify an architecture.')
+						}
+
+						c := client.new(conf.address, conf.api_key)
+						c.queue_job(target_id, arch, force)!
+					} else {
+						build(conf, target_id, force)!
+					}
 				}
 			},
 		]
 	}
 }
 
-// get_repo_by_prefix tries to find the repo with the given prefix in its
-// ID. If multiple or none are found, an error is raised.
-
 // list prints out a list of all repositories.
-fn list(conf Config, filter TargetFilter, raw bool) ? {
+fn list(conf Config, filter TargetFilter, raw bool) ! {
 	c := client.new(conf.address, conf.api_key)
-	repos := c.get_targets(filter)?
-	data := repos.map([it.id.str(), it.kind, it.url, it.repo])
+	targets := c.get_targets(filter)!
+	data := targets.map([it.id.str(), it.kind, it.url, it.repo])
 
 	if raw {
 		println(console.tabbed_table(data))
 	} else {
-		println(console.pretty_table(['id', 'kind', 'url', 'repo'], data)?)
+		println(console.pretty_table(['id', 'kind', 'url', 'repo'], data)!)
 	}
 }
 
-// add adds a new repository to the server's list.
-fn add(conf Config, t &NewTarget, raw bool) ? {
+// add adds a new target to the server's list.
+fn add(conf Config, t &NewTarget, raw bool) ! {
 	c := client.new(conf.address, conf.api_key)
-	res := c.add_target(t)?
+	target_id := c.add_target(t)!
 
 	if raw {
-		println(res.data)
+		println(target_id)
 	} else {
-		println('Target added with id $res.data')
+		println('Target added with id $target_id')
 	}
 }
 
-// remove removes a repository from the server's list.
-fn remove(conf Config, id string) ? {
-	id_int := id.int()
-
-	if id_int != 0 {
-		c := client.new(conf.address, conf.api_key)
-		res := c.remove_target(id_int)?
-		println(res.message)
-	}
+// remove removes a target from the server's list.
+fn remove(conf Config, id string) ! {
+	c := client.new(conf.address, conf.api_key)
+	c.remove_target(id.int())!
 }
 
-// patch patches a given repository with the provided params.
-fn patch(conf Config, id string, params map[string]string) ? {
+// patch patches a given target with the provided params.
+fn patch(conf Config, id string, params map[string]string) ! {
 	// We check the cron expression first because it's useless to send an
 	// invalid one to the server.
 	if 'schedule' in params && params['schedule'] != '' {
@@ -242,24 +277,13 @@ fn patch(conf Config, id string, params map[string]string) ? {
 		}
 	}
 
-	id_int := id.int()
-	if id_int != 0 {
-		c := client.new(conf.address, conf.api_key)
-		res := c.patch_target(id_int, params)?
-
-		println(res.message)
-	}
-}
-
-// info shows detailed information for a given repo.
-fn info(conf Config, id string) ? {
-	id_int := id.int()
-
-	if id_int == 0 {
-		return
-	}
-
 	c := client.new(conf.address, conf.api_key)
-	repo := c.get_target(id_int)?
-	println(repo)
+	c.patch_target(id.int(), params)!
+}
+
+// info shows detailed information for a given target.
+fn info(conf Config, id string) ! {
+	c := client.new(conf.address, conf.api_key)
+	target := c.get_target(id.int())!
+	println(target)
 }
diff --git a/src/cron/cli.v b/src/cron/cli.v
index 4d95833..16a3537 100644
--- a/src/cron/cli.v
+++ b/src/cron/cli.v
@@ -1,7 +1,7 @@
 module cron
 
 import cli
-import vieter_v.conf as vconf
+import conf as vconf
 
 struct Config {
 pub:
@@ -22,11 +22,11 @@ pub fn cmd() cli.Command {
 	return cli.Command{
 		name: 'cron'
 		description: 'Start the cron service that periodically runs builds.'
-		execute: fn (cmd cli.Command) ? {
-			config_file := cmd.flags.get_string('config-file')?
-			conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)?
+		execute: fn (cmd cli.Command) ! {
+			config_file := cmd.flags.get_string('config-file')!
+			conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)!
 
-			cron(conf)?
+			cron(conf)!
 		}
 	}
 }
diff --git a/src/cron/cron.v b/src/cron/cron.v
index 5f128cf..f1d6b7b 100644
--- a/src/cron/cron.v
+++ b/src/cron/cron.v
@@ -8,7 +8,7 @@ import os
 const log_file_name = 'vieter.cron.log'
 
 // cron starts a cron daemon & starts periodically scheduling builds.
-pub fn cron(conf Config) ? {
+pub fn cron(conf Config) ! {
 	// Configure logger
 	log_level := log.level_from_tag(conf.log_level) or {
 		return error('Invalid log level. The allowed values are FATAL, ERROR, WARN, INFO & DEBUG.')
@@ -27,7 +27,7 @@ pub fn cron(conf Config) ? {
 	}
 
 	mut d := daemon.init_daemon(logger, conf.address, conf.api_key, conf.base_image, ce,
-		conf.max_concurrent_builds, conf.api_update_frequency, conf.image_rebuild_frequency)?
+		conf.max_concurrent_builds, conf.api_update_frequency, conf.image_rebuild_frequency)!
 
 	d.run()
 }
diff --git a/src/cron/daemon/build.v b/src/cron/daemon/build.v
index beed9fc..42edc92 100644
--- a/src/cron/daemon/build.v
+++ b/src/cron/daemon/build.v
@@ -79,7 +79,7 @@ fn (mut d Daemon) run_build(build_index int, sb ScheduledBuild) {
 	mut status := 0
 
 	res := build.build_target(d.client.address, d.client.api_key, d.builder_images.last(),
-		&sb.target) or {
+		&sb.target, false) or {
 		d.ldebug('build_target error: $err.msg()')
 		status = 1
 
diff --git a/src/cron/daemon/daemon.v b/src/cron/daemon/daemon.v
index 934d35a..0d30a23 100644
--- a/src/cron/daemon/daemon.v
+++ b/src/cron/daemon/daemon.v
@@ -6,7 +6,7 @@ import datatypes { MinHeap }
 import cron.expression { CronExpression, parse_expression }
 import math
 import build
-import vieter_v.docker
+import docker
 import os
 import client
 import models { Target }
@@ -53,7 +53,7 @@ mut:
 
 // init_daemon initializes a new Daemon object. It renews the targets &
 // populates the build queue for the first time.
-pub fn init_daemon(logger log.Log, address string, api_key string, base_image string, global_schedule CronExpression, max_concurrent_builds int, api_update_frequency int, image_rebuild_frequency int) ?Daemon {
+pub fn init_daemon(logger log.Log, address string, api_key string, base_image string, global_schedule CronExpression, max_concurrent_builds int, api_update_frequency int, image_rebuild_frequency int) !Daemon {
 	mut d := Daemon{
 		client: client.new(address, api_key)
 		base_image: base_image
@@ -207,7 +207,7 @@ fn (mut d Daemon) renew_queue() {
 
 	// For some reason, using
 	// ```v
-	// for d.queue.len() > 0 && d.queue.peek() ?.timestamp < now {
+	// for d.queue.len() > 0 && d.queue.peek() !.timestamp < now {
 	//```
 	// here causes the function to prematurely just exit, without any errors or anything, very weird
 	// https://github.com/vlang/v/issues/14042
diff --git a/src/cron/daemon/log.v b/src/cron/daemon/log.v
index 003898b..95a50e7 100644
--- a/src/cron/daemon/log.v
+++ b/src/cron/daemon/log.v
@@ -3,33 +3,33 @@ module daemon
 import log
 
 // log reate a log message with the given level
-pub fn (mut d Daemon) log(msg &string, level log.Level) {
+pub fn (mut d Daemon) log(msg string, level log.Level) {
 	lock d.logger {
 		d.logger.send_output(msg, level)
 	}
 }
 
 // lfatal create a log message with the fatal level
-pub fn (mut d Daemon) lfatal(msg &string) {
+pub fn (mut d Daemon) lfatal(msg string) {
 	d.log(msg, log.Level.fatal)
 }
 
 // lerror create a log message with the error level
-pub fn (mut d Daemon) lerror(msg &string) {
+pub fn (mut d Daemon) lerror(msg string) {
 	d.log(msg, log.Level.error)
 }
 
 // lwarn create a log message with the warn level
-pub fn (mut d Daemon) lwarn(msg &string) {
+pub fn (mut d Daemon) lwarn(msg string) {
 	d.log(msg, log.Level.warn)
 }
 
 // linfo create a log message with the info level
-pub fn (mut d Daemon) linfo(msg &string) {
+pub fn (mut d Daemon) linfo(msg string) {
 	d.log(msg, log.Level.info)
 }
 
 // ldebug create a log message with the debug level
-pub fn (mut d Daemon) ldebug(msg &string) {
+pub fn (mut d Daemon) ldebug(msg string) {
 	d.log(msg, log.Level.debug)
 }
diff --git a/src/cron/expression/expression.v b/src/cron/expression/expression.v
index 17d2dde..c3ff8c5 100644
--- a/src/cron/expression/expression.v
+++ b/src/cron/expression/expression.v
@@ -12,7 +12,7 @@ pub struct CronExpression {
 // next calculates the earliest time this cron expression is valid. It will
 // always pick a moment in the future, even if ref matches completely up to the
 // minute. This function conciously does not take gap years into account.
-pub fn (ce &CronExpression) next(ref time.Time) ?time.Time {
+pub fn (ce &CronExpression) next(ref time.Time) !time.Time {
 	// If the given ref matches the next cron occurence up to the minute, it
 	// will return that value. Because we always want to return a value in the
 	// future, we artifically shift the ref 60 seconds to make sure we always
@@ -117,159 +117,20 @@ pub fn (ce &CronExpression) next(ref time.Time) ?time.Time {
 
 // next_from_now returns the result of ce.next(ref) where ref is the result of
 // time.now().
-pub fn (ce &CronExpression) next_from_now() ?time.Time {
+pub fn (ce &CronExpression) next_from_now() !time.Time {
 	return ce.next(time.now())
 }
 
 // next_n returns the n next occurences of the expression, given a starting
 // time.
-pub fn (ce &CronExpression) next_n(ref time.Time, n int) ?[]time.Time {
+pub fn (ce &CronExpression) next_n(ref time.Time, n int) ![]time.Time {
 	mut times := []time.Time{cap: n}
 
-	times << ce.next(ref)?
+	times << ce.next(ref)!
 
 	for i in 1 .. n {
-		times << ce.next(times[i - 1])?
+		times << ce.next(times[i - 1])!
 	}
 
 	return times
 }
-
-// parse_range parses a given string into a range of sorted integers, if
-// possible.
-fn parse_range(s string, min int, max int, mut bitv []bool) ? {
-	mut start := min
-	mut end := max
-	mut interval := 1
-
-	exps := s.split('/')
-
-	if exps.len > 2 {
-		return error('Invalid expression.')
-	}
-
-	if exps[0] != '*' {
-		dash_parts := exps[0].split('-')
-
-		if dash_parts.len > 2 {
-			return error('Invalid expression.')
-		}
-
-		start = dash_parts[0].int()
-
-		// The builtin parsing functions return zero if the string can't be
-		// parsed into a number, so we have to explicitely check whether they
-		// actually entered zero or if it's an invalid number.
-		if start == 0 && dash_parts[0] != '0' {
-			return error('Invalid number.')
-		}
-
-		// Check whether the start value is out of range
-		if start < min || start > max {
-			return error('Out of range.')
-		}
-
-		if dash_parts.len == 2 {
-			end = dash_parts[1].int()
-
-			if end == 0 && dash_parts[1] != '0' {
-				return error('Invalid number.')
-			}
-
-			if end < start || end > max {
-				return error('Out of range.')
-			}
-		}
-	}
-
-	if exps.len > 1 {
-		interval = exps[1].int()
-
-		// interval being zero is always invalid, but we want to check why
-		// it's invalid for better error messages.
-		if interval == 0 {
-			if exps[1] != '0' {
-				return error('Invalid number.')
-			} else {
-				return error('Step size zero not allowed.')
-			}
-		}
-
-		if interval > max - min {
-			return error('Step size too large.')
-		}
-	}
-	// Here, s solely consists of a number, so that's the only value we
-	// should return.
-	else if exps[0] != '*' && !exps[0].contains('-') {
-		bitv[start - min] = true
-		return
-	}
-
-	for start <= end {
-		bitv[start - min] = true
-		start += interval
-	}
-}
-
-// bitv_to_ints converts a bit vector into an array containing the
-// corresponding values.
-fn bitv_to_ints(bitv []bool, min int) []int {
-	mut out := []int{}
-
-	for i in 0 .. bitv.len {
-		if bitv[i] {
-			out << min + i
-		}
-	}
-
-	return out
-}
-
-// parse_part parses a given part of a cron expression & returns the
-// corresponding array of ints.
-fn parse_part(s string, min int, max int) ?[]int {
-	mut bitv := []bool{len: max - min + 1, init: false}
-
-	for range in s.split(',') {
-		parse_range(range, min, max, mut bitv)?
-	}
-
-	return bitv_to_ints(bitv, min)
-}
-
-// parse_expression parses an entire cron expression string into a
-// CronExpression object, if possible.
-pub fn parse_expression(exp string) ?CronExpression {
-	// The filter allows for multiple spaces between parts
-	mut parts := exp.split(' ').filter(it != '')
-
-	if parts.len < 2 || parts.len > 4 {
-		return error('Expression must contain between 2 and 4 space-separated parts.')
-	}
-
-	// For ease of use, we allow the user to only specify as many parts as they
-	// need.
-	for parts.len < 4 {
-		parts << '*'
-	}
-
-	mut part_results := [][]int{}
-
-	mins := [0, 0, 1, 1]
-	maxs := [59, 23, 31, 12]
-
-	// This for loop allows us to more clearly propagate the error to the user.
-	for i, min in mins {
-		part_results << parse_part(parts[i], min, maxs[i]) or {
-			return error('An error occurred with part $i: $err.msg()')
-		}
-	}
-
-	return CronExpression{
-		minutes: part_results[0]
-		hours: part_results[1]
-		days: part_results[2]
-		months: part_results[3]
-	}
-}
diff --git a/src/cron/expression/expression_parse.v b/src/cron/expression/expression_parse.v
new file mode 100644
index 0000000..4aaec5b
--- /dev/null
+++ b/src/cron/expression/expression_parse.v
@@ -0,0 +1,146 @@
+module expression
+
+import bitfield
+
+// parse_range parses a given string into a range of sorted integers. Its
+// result is a BitField with set bits for all numbers in the result.
+fn parse_range(s string, min int, max int) !bitfield.BitField {
+	mut start := min
+	mut end := max
+	mut interval := 1
+	mut bf := bitfield.new(max - min + 1)
+
+	exps := s.split('/')
+
+	if exps.len > 2 {
+		return error('Invalid expression.')
+	}
+
+	if exps[0] != '*' {
+		dash_parts := exps[0].split('-')
+
+		if dash_parts.len > 2 {
+			return error('Invalid expression.')
+		}
+
+		start = dash_parts[0].int()
+
+		// The builtin parsing functions return zero if the string can't be
+		// parsed into a number, so we have to explicitely check whether they
+		// actually entered zero or if it's an invalid number.
+		if start == 0 && dash_parts[0] != '0' {
+			return error('Invalid number.')
+		}
+
+		// Check whether the start value is out of range
+		if start < min || start > max {
+			return error('Out of range.')
+		}
+
+		if dash_parts.len == 2 {
+			end = dash_parts[1].int()
+
+			if end == 0 && dash_parts[1] != '0' {
+				return error('Invalid number.')
+			}
+
+			if end < start || end > max {
+				return error('Out of range.')
+			}
+		}
+	}
+
+	if exps.len > 1 {
+		interval = exps[1].int()
+
+		// interval being zero is always invalid, but we want to check why
+		// it's invalid for better error messages.
+		if interval == 0 {
+			if exps[1] != '0' {
+				return error('Invalid number.')
+			} else {
+				return error('Step size zero not allowed.')
+			}
+		}
+
+		if interval > max - min {
+			return error('Step size too large.')
+		}
+	}
+	// Here, s solely consists of a number, so that's the only value we
+	// should return.
+	else if exps[0] != '*' && !exps[0].contains('-') {
+		bf.set_bit(start - min)
+		return bf
+	}
+
+	for start <= end {
+		bf.set_bit(start - min)
+		start += interval
+	}
+
+	return bf
+}
+
+// bf_to_ints takes a BitField and converts it into the expected list of actual
+// integers.
+fn bf_to_ints(bf bitfield.BitField, min int) []int {
+	mut out := []int{}
+
+	for i in 0 .. bf.get_size() {
+		if bf.get_bit(i) == 1 {
+			out << min + i
+		}
+	}
+
+	return out
+}
+
+// parse_part parses a given part of a cron expression & returns the
+// corresponding array of ints.
+fn parse_part(s string, min int, max int) ![]int {
+	mut bf := bitfield.new(max - min + 1)
+
+	for range in s.split(',') {
+		bf2 := parse_range(range, min, max)!
+		bf = bitfield.bf_or(bf, bf2)
+	}
+
+	return bf_to_ints(bf, min)
+}
+
+// parse_expression parses an entire cron expression string into a
+// CronExpression object, if possible.
+pub fn parse_expression(exp string) !CronExpression {
+	// The filter allows for multiple spaces between parts
+	mut parts := exp.split(' ').filter(it != '')
+
+	if parts.len < 2 || parts.len > 4 {
+		return error('Expression must contain between 2 and 4 space-separated parts.')
+	}
+
+	// For ease of use, we allow the user to only specify as many parts as they
+	// need.
+	for parts.len < 4 {
+		parts << '*'
+	}
+
+	mut part_results := [][]int{}
+
+	mins := [0, 0, 1, 1]
+	maxs := [59, 23, 31, 12]
+
+	// This for loop allows us to more clearly propagate the error to the user.
+	for i, min in mins {
+		part_results << parse_part(parts[i], min, maxs[i]) or {
+			return error('An error occurred with part $i: $err.msg()')
+		}
+	}
+
+	return CronExpression{
+		minutes: part_results[0]
+		hours: part_results[1]
+		days: part_results[2]
+		months: part_results[3]
+	}
+}
diff --git a/src/cron/expression/expression_parse_test.v b/src/cron/expression/expression_parse_test.v
index 4eebc49..92e8291 100644
--- a/src/cron/expression/expression_parse_test.v
+++ b/src/cron/expression/expression_parse_test.v
@@ -3,96 +3,87 @@ module expression
 // parse_range_error returns the returned error message. If the result is '',
 // that means the function didn't error.
 fn parse_range_error(s string, min int, max int) string {
-	mut bitv := []bool{len: max - min + 1, init: false}
-
-	parse_range(s, min, max, mut bitv) or { return err.msg }
+	parse_range(s, min, max) or { return err.msg }
 
 	return ''
 }
 
 // =====parse_range=====
-fn test_range_star_range() ? {
-	mut bitv := []bool{len: 6, init: false}
-	parse_range('*', 0, 5, mut bitv)?
+fn test_range_star_range() ! {
+	bf := parse_range('*', 0, 5)!
 
-	assert bitv == [true, true, true, true, true, true]
+	assert bf_to_ints(bf, 0) == [0, 1, 2, 3, 4, 5]
 }
 
-fn test_range_number() ? {
-	mut bitv := []bool{len: 6, init: false}
-	parse_range('4', 0, 5, mut bitv)?
+fn test_range_number() ! {
+	bf := parse_range('4', 0, 5)!
 
-	assert bitv_to_ints(bitv, 0) == [4]
+	assert bf_to_ints(bf, 0) == [4]
 }
 
-fn test_range_number_too_large() ? {
+fn test_range_number_too_large() ! {
 	assert parse_range_error('10', 0, 6) == 'Out of range.'
 }
 
-fn test_range_number_too_small() ? {
+fn test_range_number_too_small() ! {
 	assert parse_range_error('0', 2, 6) == 'Out of range.'
 }
 
-fn test_range_number_invalid() ? {
+fn test_range_number_invalid() ! {
 	assert parse_range_error('x', 0, 6) == 'Invalid number.'
 }
 
-fn test_range_step_star_1() ? {
-	mut bitv := []bool{len: 21, init: false}
-	parse_range('*/4', 0, 20, mut bitv)?
+fn test_range_step_star_1() ! {
+	bf := parse_range('*/4', 0, 20)!
 
-	assert bitv_to_ints(bitv, 0) == [0, 4, 8, 12, 16, 20]
+	assert bf_to_ints(bf, 0) == [0, 4, 8, 12, 16, 20]
 }
 
-fn test_range_step_star_2() ? {
-	mut bitv := []bool{len: 8, init: false}
-	parse_range('*/3', 1, 8, mut bitv)?
+fn test_range_step_star_2() ! {
+	bf := parse_range('*/3', 1, 8)!
 
-	assert bitv_to_ints(bitv, 1) == [1, 4, 7]
+	assert bf_to_ints(bf, 1) == [1, 4, 7]
 }
 
-fn test_range_step_star_too_large() ? {
+fn test_range_step_star_too_large() ! {
 	assert parse_range_error('*/21', 0, 20) == 'Step size too large.'
 }
 
-fn test_range_step_zero() ? {
+fn test_range_step_zero() ! {
 	assert parse_range_error('*/0', 0, 20) == 'Step size zero not allowed.'
 }
 
-fn test_range_step_number() ? {
-	mut bitv := []bool{len: 21, init: false}
-	parse_range('5/4', 2, 22, mut bitv)?
+fn test_range_step_number() ! {
+	bf := parse_range('5/4', 2, 22)!
 
-	assert bitv_to_ints(bitv, 2) == [5, 9, 13, 17, 21]
+	assert bf_to_ints(bf, 2) == [5, 9, 13, 17, 21]
 }
 
-fn test_range_step_number_too_large() ? {
+fn test_range_step_number_too_large() ! {
 	assert parse_range_error('10/4', 0, 5) == 'Out of range.'
 }
 
-fn test_range_step_number_too_small() ? {
+fn test_range_step_number_too_small() ! {
 	assert parse_range_error('2/4', 5, 10) == 'Out of range.'
 }
 
-fn test_range_dash() ? {
-	mut bitv := []bool{len: 10, init: false}
-	parse_range('4-8', 0, 9, mut bitv)?
+fn test_range_dash() ! {
+	bf := parse_range('4-8', 0, 9)!
 
-	assert bitv_to_ints(bitv, 0) == [4, 5, 6, 7, 8]
+	assert bf_to_ints(bf, 0) == [4, 5, 6, 7, 8]
 }
 
-fn test_range_dash_step() ? {
-	mut bitv := []bool{len: 10, init: false}
-	parse_range('4-8/2', 0, 9, mut bitv)?
+fn test_range_dash_step() ! {
+	bf := parse_range('4-8/2', 0, 9)!
 
-	assert bitv_to_ints(bitv, 0) == [4, 6, 8]
+	assert bf_to_ints(bf, 0) == [4, 6, 8]
 }
 
 // =====parse_part=====
-fn test_part_single() ? {
-	assert parse_part('*', 0, 5)? == [0, 1, 2, 3, 4, 5]
+fn test_part_single() ! {
+	assert parse_part('*', 0, 5)! == [0, 1, 2, 3, 4, 5]
 }
 
-fn test_part_multiple() ? {
-	assert parse_part('*/2,2/3', 1, 8)? == [1, 2, 3, 5, 7, 8]
+fn test_part_multiple() ! {
+	assert parse_part('*/2,2/3', 1, 8)! == [1, 2, 3, 5, 7, 8]
 }
diff --git a/src/cron/expression/expression_test.v b/src/cron/expression/expression_test.v
index 9e25e92..82bf959 100644
--- a/src/cron/expression/expression_test.v
+++ b/src/cron/expression/expression_test.v
@@ -2,12 +2,12 @@ module expression
 
 import time { parse }
 
-fn util_test_time(exp string, t1_str string, t2_str string) ? {
-	ce := parse_expression(exp)?
-	t1 := parse(t1_str)?
-	t2 := parse(t2_str)?
+fn util_test_time(exp string, t1_str string, t2_str string) ! {
+	ce := parse_expression(exp)!
+	t1 := parse(t1_str)!
+	t2 := parse(t2_str)!
 
-	t3 := ce.next(t1)?
+	t3 := ce.next(t1)!
 
 	assert t2.year == t3.year
 	assert t2.month == t3.month
@@ -16,19 +16,19 @@ fn util_test_time(exp string, t1_str string, t2_str string) ? {
 	assert t2.minute == t3.minute
 }
 
-fn test_next_simple() ? {
+fn test_next_simple() ! {
 	// Very simple
-	util_test_time('0 3', '2002-01-01 00:00:00', '2002-01-01 03:00:00')?
+	util_test_time('0 3', '2002-01-01 00:00:00', '2002-01-01 03:00:00')!
 
 	// Overlap to next day
-	util_test_time('0 3', '2002-01-01 03:00:00', '2002-01-02 03:00:00')?
-	util_test_time('0 3', '2002-01-01 04:00:00', '2002-01-02 03:00:00')?
+	util_test_time('0 3', '2002-01-01 03:00:00', '2002-01-02 03:00:00')!
+	util_test_time('0 3', '2002-01-01 04:00:00', '2002-01-02 03:00:00')!
 
-	util_test_time('0 3/4', '2002-01-01 04:00:00', '2002-01-01 07:00:00')?
+	util_test_time('0 3/4', '2002-01-01 04:00:00', '2002-01-01 07:00:00')!
 
 	// Overlap to next month
-	util_test_time('0 3', '2002-11-31 04:00:00', '2002-12-01 03:00:00')?
+	util_test_time('0 3', '2002-11-31 04:00:00', '2002-12-01 03:00:00')!
 
 	// Overlap to next year
-	util_test_time('0 3', '2002-12-31 04:00:00', '2003-01-01 03:00:00')?
+	util_test_time('0 3', '2002-12-31 04:00:00', '2003-01-01 03:00:00')!
 }
diff --git a/src/db/db.v b/src/db/db.v
index 9459c05..98ee000 100644
--- a/src/db/db.v
+++ b/src/db/db.v
@@ -17,17 +17,21 @@ const (
 		$embed_file('migrations/001-initial/up.sql'),
 		$embed_file('migrations/002-rename-to-targets/up.sql'),
 		$embed_file('migrations/003-target-url-type/up.sql'),
+		$embed_file('migrations/004-nullable-branch/up.sql'),
+		$embed_file('migrations/005-repo-path/up.sql'),
 	]
 	migrations_down = [
 		$embed_file('migrations/001-initial/down.sql'),
 		$embed_file('migrations/002-rename-to-targets/down.sql'),
 		$embed_file('migrations/003-target-url-type/down.sql'),
+		$embed_file('migrations/004-nullable-branch/down.sql'),
+		$embed_file('migrations/005-repo-path/down.sql'),
 	]
 )
 
 // init initializes a database & adds the correct tables.
-pub fn init(db_path string) ?VieterDb {
-	conn := sqlite.connect(db_path)?
+pub fn init(db_path string) !VieterDb {
+	conn := sqlite.connect(db_path)!
 
 	sql conn {
 		create table MigrationVersion
@@ -60,7 +64,7 @@ pub fn init(db_path string) ?VieterDb {
 			res := conn.exec_none(part)
 
 			if res != sqlite.sqlite_done {
-				return error('An error occurred while applying migration $version_num')
+				return error('An error occurred while applying migration $version_num: SQLite error code $res')
 			}
 		}
 
diff --git a/src/db/logs.v b/src/db/logs.v
index 923dde2..2745467 100644
--- a/src/db/logs.v
+++ b/src/db/logs.v
@@ -84,6 +84,8 @@ pub fn (db &VieterDb) add_build_log(log BuildLog) int {
 		insert log into BuildLog
 	}
 
+	// Here, this does work because a log doesn't contain any foreign keys,
+	// meaning the ORM only has to do a single add
 	inserted_id := db.conn.last_id() as int
 
 	return inserted_id
diff --git a/src/db/migrations/004-nullable-branch/down.sql b/src/db/migrations/004-nullable-branch/down.sql
new file mode 100644
index 0000000..2515593
--- /dev/null
+++ b/src/db/migrations/004-nullable-branch/down.sql
@@ -0,0 +1,26 @@
+-- This down won't really work because it'll throw NOT NULL errors, but I'm
+-- just putting it here for future reference (still not sure whether I'm even
+    -- gonna use these)
+PRAGMA foreign_keys=off;
+
+BEGIN TRANSACTION;
+
+ALTER TABLE Target RENAME TO _Target_old;
+
+CREATE TABLE Target (
+    id INTEGER PRIMARY KEY,
+    url TEXT NOT NULL,
+    branch TEXT NOT NULL,
+    repo TEXT NOT NULL,
+    schedule TEXT,
+    kind TEXT NOT NULL DEFAULT 'git'
+);
+
+INSERT INTO Target (id, url, branch, repo, schedule, kind)
+    SELECT id, url, branch, repo, schedule, kind FROM _Target_old;
+
+DROP TABLE _Target_old;
+
+COMMIT;
+
+PRAGMA foreign_keys=on;
diff --git a/src/db/migrations/004-nullable-branch/up.sql b/src/db/migrations/004-nullable-branch/up.sql
new file mode 100644
index 0000000..6333c37
--- /dev/null
+++ b/src/db/migrations/004-nullable-branch/up.sql
@@ -0,0 +1,23 @@
+PRAGMA foreign_keys=off;
+
+BEGIN TRANSACTION;
+
+ALTER TABLE Target RENAME TO _Target_old;
+
+CREATE TABLE Target (
+    id INTEGER PRIMARY KEY,
+    url TEXT NOT NULL,
+    branch TEXT,
+    repo TEXT NOT NULL,
+    schedule TEXT,
+    kind TEXT NOT NULL DEFAULT 'git'
+);
+
+INSERT INTO Target (id, url, branch, repo, schedule, kind)
+    SELECT id, url, branch, repo, schedule, kind FROM _Target_old;
+
+DROP TABLE _Target_old;
+
+COMMIT;
+
+PRAGMA foreign_keys=on;
diff --git a/src/db/migrations/005-repo-path/down.sql b/src/db/migrations/005-repo-path/down.sql
new file mode 100644
index 0000000..8a6f021
--- /dev/null
+++ b/src/db/migrations/005-repo-path/down.sql
@@ -0,0 +1 @@
+ALTER TABLE Target DROP COLUMN path;
diff --git a/src/db/migrations/005-repo-path/up.sql b/src/db/migrations/005-repo-path/up.sql
new file mode 100644
index 0000000..f7e5c29
--- /dev/null
+++ b/src/db/migrations/005-repo-path/up.sql
@@ -0,0 +1 @@
+ALTER TABLE Target ADD COLUMN path TEXT;
diff --git a/src/db/targets.v b/src/db/targets.v
index a705ebb..41e56df 100644
--- a/src/db/targets.v
+++ b/src/db/targets.v
@@ -38,14 +38,17 @@ pub fn (db &VieterDb) get_target(target_id int) ?Target {
 }
 
 // add_target inserts the given target into the database.
-pub fn (db &VieterDb) add_target(repo Target) int {
+pub fn (db &VieterDb) add_target(target Target) int {
 	sql db.conn {
-		insert repo into Target
+		insert target into Target
 	}
 
-	inserted_id := db.conn.last_id() as int
+	// ID of inserted target is the largest id
+	inserted_target := sql db.conn {
+		select from Target order by id desc limit 1
+	}
 
-	return inserted_id
+	return inserted_target.id
 }
 
 // delete_target deletes the target with the given id from the database.
diff --git a/src/main.v b/src/main.v
index fc09f7e..1053c2f 100644
--- a/src/main.v
+++ b/src/main.v
@@ -9,12 +9,18 @@ import console.schedule
 import console.man
 import console.aur
 import cron
+import agent
 
 fn main() {
+	// Stop buffering output so logs always show up immediately
+	unsafe {
+		C.setbuf(C.stdout, 0)
+	}
+
 	mut app := cli.Command{
 		name: 'vieter'
 		description: 'Vieter is a lightweight implementation of an Arch repository server.'
-		version: '0.4.0'
+		version: '0.5.0-rc.1'
 		flags: [
 			cli.Flag{
 				flag: cli.FlagType.string
@@ -40,6 +46,7 @@ fn main() {
 			schedule.cmd(),
 			man.cmd(),
 			aur.cmd(),
+			agent.cmd(),
 		]
 	}
 	app.setup()
diff --git a/src/models/builds.v b/src/models/builds.v
new file mode 100644
index 0000000..926a53c
--- /dev/null
+++ b/src/models/builds.v
@@ -0,0 +1,18 @@
+module models
+
+pub struct BuildConfig {
+pub:
+	target_id  int
+	kind       string
+	url        string
+	branch     string
+	path       string
+	repo       string
+	base_image string
+	force      bool
+}
+
+// str return a single-line string representation of a build log
+pub fn (c BuildConfig) str() string {
+	return '{ target: $c.target_id, kind: $c.kind, url: $c.url, branch: $c.branch, path: $c.path, repo: $c.repo, base_image: $c.base_image, force: $c.force }'
+}
diff --git a/src/models/targets.v b/src/models/targets.v
index c8aa535..af3cb0d 100644
--- a/src/models/targets.v
+++ b/src/models/targets.v
@@ -28,27 +28,45 @@ pub mut:
 	repo string [nonull]
 	// Cron schedule describing how frequently to build the repo.
 	schedule string
+	// Subdirectory in the Git repository to cd into
+	path string
 	// On which architectures the package is allowed to be built. In reality,
-	// this controls which builders will periodically build the image.
+	// this controls which agents will build this package when scheduled.
 	arch []TargetArch [fkey: 'target_id']
 }
 
 // str returns a string representation.
-pub fn (gr &Target) str() string {
+pub fn (t &Target) str() string {
 	mut parts := [
-		'id: $gr.id',
-		'kind: $gr.kind',
-		'url: $gr.url',
-		'branch: $gr.branch',
-		'repo: $gr.repo',
-		'schedule: $gr.schedule',
-		'arch: ${gr.arch.map(it.value).join(', ')}',
+		'id: $t.id',
+		'kind: $t.kind',
+		'url: $t.url',
+		'branch: $t.branch',
+		'path: $t.path',
+		'repo: $t.repo',
+		'schedule: $t.schedule',
+		'arch: ${t.arch.map(it.value).join(', ')}',
 	]
 	str := parts.join('\n')
 
 	return str
 }
 
+// as_build_config converts a Target into a BuildConfig, given some extra
+// needed information.
+pub fn (t &Target) as_build_config(base_image string, force bool) BuildConfig {
+	return BuildConfig{
+		target_id: t.id
+		kind: t.kind
+		url: t.url
+		branch: t.branch
+		path: t.path
+		repo: t.repo
+		base_image: base_image
+		force: force
+	}
+}
+
 [params]
 pub struct TargetFilter {
 pub mut:
diff --git a/src/package/README.md b/src/package/README.md
new file mode 100644
index 0000000..b2bcbd7
--- /dev/null
+++ b/src/package/README.md
@@ -0,0 +1,5 @@
+# package
+
+This module handles both parsing the published Arch tarballs & the contents of
+their `.PKGINFO` files, as well as generating the contents of the database
+archives' `desc` & `files` files.
diff --git a/src/package/format.v b/src/package/format.v
new file mode 100644
index 0000000..a81d327
--- /dev/null
+++ b/src/package/format.v
@@ -0,0 +1,103 @@
+module package
+
+// format_entry returns a string properly formatted to be added to a desc file.
+[inline]
+fn format_entry(key string, value string) string {
+	return '\n%$key%\n$value\n'
+}
+
+// full_name returns the properly formatted name for the package, including
+// version & architecture
+pub fn (pkg &Pkg) full_name() string {
+	p := pkg.info
+	return '$p.name-$p.version-$p.arch'
+}
+
+// filename returns the correct filename of the package file
+pub fn (pkg &Pkg) filename() string {
+	ext := match pkg.compression {
+		0 { '.tar' }
+		1 { '.tar.gz' }
+		6 { '.tar.xz' }
+		14 { '.tar.zst' }
+		else { panic("Another compression code shouldn't be possible. Faulty code: $pkg.compression") }
+	}
+
+	return '${pkg.full_name()}.pkg$ext'
+}
+
+// to_desc returns a desc file valid string representation
+pub fn (pkg &Pkg) to_desc() !string {
+	p := pkg.info
+
+	// filename
+	mut desc := '%FILENAME%\n$pkg.filename()\n'
+
+	desc += format_entry('NAME', p.name)
+	desc += format_entry('BASE', p.base)
+	desc += format_entry('VERSION', p.version)
+
+	if p.description.len > 0 {
+		desc += format_entry('DESC', p.description)
+	}
+
+	if p.groups.len > 0 {
+		desc += format_entry('GROUPS', p.groups.join_lines())
+	}
+
+	desc += format_entry('CSIZE', p.csize.str())
+	desc += format_entry('ISIZE', p.size.str())
+
+	sha256sum := pkg.checksum()!
+
+	desc += format_entry('SHA256SUM', sha256sum)
+
+	// TODO add pgpsig stuff
+
+	if p.url.len > 0 {
+		desc += format_entry('URL', p.url)
+	}
+
+	if p.licenses.len > 0 {
+		desc += format_entry('LICENSE', p.licenses.join_lines())
+	}
+
+	desc += format_entry('ARCH', p.arch)
+	desc += format_entry('BUILDDATE', p.build_date.str())
+	desc += format_entry('PACKAGER', p.packager)
+
+	if p.replaces.len > 0 {
+		desc += format_entry('REPLACES', p.replaces.join_lines())
+	}
+
+	if p.conflicts.len > 0 {
+		desc += format_entry('CONFLICTS', p.conflicts.join_lines())
+	}
+
+	if p.provides.len > 0 {
+		desc += format_entry('PROVIDES', p.provides.join_lines())
+	}
+
+	if p.depends.len > 0 {
+		desc += format_entry('DEPENDS', p.depends.join_lines())
+	}
+
+	if p.optdepends.len > 0 {
+		desc += format_entry('OPTDEPENDS', p.optdepends.join_lines())
+	}
+
+	if p.makedepends.len > 0 {
+		desc += format_entry('MAKEDEPENDS', p.makedepends.join_lines())
+	}
+
+	if p.checkdepends.len > 0 {
+		desc += format_entry('CHECKDEPENDS', p.checkdepends.join_lines())
+	}
+
+	return '$desc\n'
+}
+
+// to_files returns a files file valid string representation
+pub fn (pkg &Pkg) to_files() string {
+	return '%FILES%\n$pkg.files.join_lines()\n'
+}
diff --git a/src/package/package.v b/src/package/package.v
index 9eaf5a2..4518ffd 100644
--- a/src/package/package.v
+++ b/src/package/package.v
@@ -43,12 +43,12 @@ pub mut:
 }
 
 // checksum calculates the sha256 hash of the package
-pub fn (p &Pkg) checksum() ?string {
+pub fn (p &Pkg) checksum() !string {
 	return util.hash_file(p.path)
 }
 
 // parse_pkg_info_string parses a PkgInfo object from a string
-fn parse_pkg_info_string(pkg_info_str &string) ?PkgInfo {
+fn parse_pkg_info_string(pkg_info_str &string) !PkgInfo {
 	mut pkg_info := PkgInfo{}
 
 	// Iterate over the entire string
@@ -101,7 +101,7 @@ fn parse_pkg_info_string(pkg_info_str &string) ?PkgInfo {
 
 // read_pkg_archive extracts the file list & .PKGINFO contents from an archive
 // NOTE: this command only supports zstd-, xz- & gzip-compressed tarballs.
-pub fn read_pkg_archive(pkg_path string) ?Pkg {
+pub fn read_pkg_archive(pkg_path string) !Pkg {
 	if !os.is_file(pkg_path) {
 		return error("'$pkg_path' doesn't exist or isn't a file.")
 	}
@@ -159,7 +159,7 @@ pub fn read_pkg_archive(pkg_path string) ?Pkg {
 
 			pkg_text := unsafe { buf.vstring_with_len(size).clone() }
 
-			pkg_info = parse_pkg_info_string(pkg_text)?
+			pkg_info = parse_pkg_info_string(pkg_text)!
 		} else {
 			C.archive_read_data_skip(a)
 		}
@@ -174,104 +174,3 @@ pub fn read_pkg_archive(pkg_path string) ?Pkg {
 		compression: compression_code
 	}
 }
-
-// format_entry returns a string properly formatted to be added to a desc file.
-fn format_entry(key string, value string) string {
-	return '\n%$key%\n$value\n'
-}
-
-// full_name returns the properly formatted name for the package, including
-// version & architecture
-pub fn (pkg &Pkg) full_name() string {
-	p := pkg.info
-	return '$p.name-$p.version-$p.arch'
-}
-
-// filename returns the correct filename of the package file
-pub fn (pkg &Pkg) filename() string {
-	ext := match pkg.compression {
-		0 { '.tar' }
-		1 { '.tar.gz' }
-		6 { '.tar.xz' }
-		14 { '.tar.zst' }
-		else { panic("Another compression code shouldn't be possible. Faulty code: $pkg.compression") }
-	}
-
-	return '${pkg.full_name()}.pkg$ext'
-}
-
-// to_desc returns a desc file valid string representation
-pub fn (pkg &Pkg) to_desc() ?string {
-	p := pkg.info
-
-	// filename
-	mut desc := '%FILENAME%\n$pkg.filename()\n'
-
-	desc += format_entry('NAME', p.name)
-	desc += format_entry('BASE', p.base)
-	desc += format_entry('VERSION', p.version)
-
-	if p.description.len > 0 {
-		desc += format_entry('DESC', p.description)
-	}
-
-	if p.groups.len > 0 {
-		desc += format_entry('GROUPS', p.groups.join_lines())
-	}
-
-	desc += format_entry('CSIZE', p.csize.str())
-	desc += format_entry('ISIZE', p.size.str())
-
-	sha256sum := pkg.checksum()?
-
-	desc += format_entry('SHA256SUM', sha256sum)
-
-	// TODO add pgpsig stuff
-
-	if p.url.len > 0 {
-		desc += format_entry('URL', p.url)
-	}
-
-	if p.licenses.len > 0 {
-		desc += format_entry('LICENSE', p.licenses.join_lines())
-	}
-
-	desc += format_entry('ARCH', p.arch)
-	desc += format_entry('BUILDDATE', p.build_date.str())
-	desc += format_entry('PACKAGER', p.packager)
-
-	if p.replaces.len > 0 {
-		desc += format_entry('REPLACES', p.replaces.join_lines())
-	}
-
-	if p.conflicts.len > 0 {
-		desc += format_entry('CONFLICTS', p.conflicts.join_lines())
-	}
-
-	if p.provides.len > 0 {
-		desc += format_entry('PROVIDES', p.provides.join_lines())
-	}
-
-	if p.depends.len > 0 {
-		desc += format_entry('DEPENDS', p.depends.join_lines())
-	}
-
-	if p.optdepends.len > 0 {
-		desc += format_entry('OPTDEPENDS', p.optdepends.join_lines())
-	}
-
-	if p.makedepends.len > 0 {
-		desc += format_entry('MAKEDEPENDS', p.makedepends.join_lines())
-	}
-
-	if p.checkdepends.len > 0 {
-		desc += format_entry('CHECKDEPENDS', p.checkdepends.join_lines())
-	}
-
-	return '$desc\n'
-}
-
-// to_files returns a files file valid string representation
-pub fn (pkg &Pkg) to_files() string {
-	return '%FILES%\n$pkg.files.join_lines()\n'
-}
diff --git a/src/repo/README.md b/src/repo/README.md
new file mode 100644
index 0000000..f06b1d3
--- /dev/null
+++ b/src/repo/README.md
@@ -0,0 +1,43 @@
+# repo
+
+This module manages the contents of the various repositories stored within a
+Vieter instance.
+
+## Terminology
+
+* Arch-repository (arch-repo): specific architecture of a given repository. This is what
+  Pacman actually uses as a repository, and contains its own `.db` & `.files`
+  files.
+* Repository (repo): a collection of arch-repositories. A single repository can
+  contain packages of different architectures, with each package being stored
+  in that specific architecture' arch-repository.
+* Repository group (repo-group): a collection of repositories. Each Vieter
+  instance consists of a single repository group, which manages all underlying
+  repositories & arch-repositories.
+
+## Arch-repository layout
+
+An arch-repository (aka a regular Pacman repository) consists of a directory
+with the following files (`{repo}` should be replaced with the name of the
+repository):
+
+* One or more package directories. These directories follow the naming scheme
+  `${pkgname}-${pkgver}-${pkgrel}`. Each of these directories contains two
+  files, `desc` & `files`. The `desc` file is a list of the package's metadata,
+  while `files` contains a list of all files that the package contains. The
+  latter is used when using `pacman -F`.
+* `{repo}.db` & `{repo}.db.tar.gz`: the database file of the repository. This
+  is just a compressed tarball of all package directories, but only their
+  `desc` files. Both these files should have the same content (`repo-add`
+  creates a symlink, but Vieter just serves the same file for both routes)
+* `{repo}.files` & `{repo}.files.tar.gz`: the same as the `.db` file, but this
+  also contains the `files` files, instead of just the `desc` files.
+
+## Filesystem layout
+
+The repository part of Vieter consists of two directories. One is the `repos`
+directory inside the configured `data_dir`, while the other is the configured
+`pkg_dir`. `repos` contains only the repository group, while `pkg_dir` contains
+the actual package archives. `pkg_dir` is the directory that can take up a
+significant amount of memory, while `repos` solely consists of small text
+files.
diff --git a/src/repo/add.v b/src/repo/add.v
index 608ca50..8ab3ae1 100644
--- a/src/repo/add.v
+++ b/src/repo/add.v
@@ -29,7 +29,7 @@ pub:
 }
 
 // new creates a new RepoGroupManager & creates the directories as needed
-pub fn new(repos_dir string, pkg_dir string, default_arch string) ?RepoGroupManager {
+pub fn new(repos_dir string, pkg_dir string, default_arch string) !RepoGroupManager {
 	if !os.is_dir(repos_dir) {
 		os.mkdir_all(repos_dir) or { return error('Failed to create repos directory: $err.msg()') }
 	}
@@ -49,27 +49,27 @@ pub fn new(repos_dir string, pkg_dir string, default_arch string) ?RepoGroupMana
 // pkg archive. It's a wrapper around add_pkg_in_repo that parses the archive
 // file, passes the result to add_pkg_in_repo, and hard links the archive to
 // the right subdirectories in r.pkg_dir if it was successfully added.
-pub fn (r &RepoGroupManager) add_pkg_from_path(repo string, pkg_path string) ?RepoAddResult {
+pub fn (r &RepoGroupManager) add_pkg_from_path(repo string, pkg_path string) !RepoAddResult {
 	pkg := package.read_pkg_archive(pkg_path) or {
 		return error('Failed to read package file: $err.msg()')
 	}
 
-	archs := r.add_pkg_in_repo(repo, pkg)?
+	archs := r.add_pkg_in_repo(repo, pkg)!
 
 	// If the add was successful, we move the file to the packages directory
 	for arch in archs {
 		repo_pkg_path := os.real_path(os.join_path(r.pkg_dir, repo, arch))
 		dest_path := os.join_path_single(repo_pkg_path, pkg.filename())
 
-		os.mkdir_all(repo_pkg_path)?
+		os.mkdir_all(repo_pkg_path)!
 
 		// We create hard links so that "any" arch packages aren't stored
 		// multiple times
-		os.link(pkg_path, dest_path)?
+		os.link(pkg_path, dest_path)!
 	}
 
 	// After linking, we can remove the original file
-	os.rm(pkg_path)?
+	os.rm(pkg_path)!
 
 	return RepoAddResult{
 		name: pkg.info.name
@@ -85,11 +85,11 @@ pub fn (r &RepoGroupManager) add_pkg_from_path(repo string, pkg_path string) ?Re
 // r.default_arch. If this arch-repo doesn't exist yet, it is created. If the
 // architecture isn't 'any', the package is only added to the specific
 // architecture.
-fn (r &RepoGroupManager) add_pkg_in_repo(repo string, pkg &package.Pkg) ?[]string {
+fn (r &RepoGroupManager) add_pkg_in_repo(repo string, pkg &package.Pkg) ![]string {
 	// A package not of arch 'any' can be handled easily by adding it to the
 	// respective repo
 	if pkg.info.arch != 'any' {
-		r.add_pkg_in_arch_repo(repo, pkg.info.arch, pkg)?
+		r.add_pkg_in_arch_repo(repo, pkg.info.arch, pkg)!
 
 		return [pkg.info.arch]
 	}
@@ -104,7 +104,7 @@ fn (r &RepoGroupManager) add_pkg_in_repo(repo string, pkg &package.Pkg) ?[]strin
 	// If this is the first package that's added to the repo, the directory
 	// won't exist yet
 	if os.exists(repo_dir) {
-		arch_repos = os.ls(repo_dir)?
+		arch_repos = os.ls(repo_dir)!
 	}
 
 	// The default_arch should always be updated when a package with arch 'any'
@@ -118,7 +118,7 @@ fn (r &RepoGroupManager) add_pkg_in_repo(repo string, pkg &package.Pkg) ?[]strin
 	// not know which arch-repositories did succeed in adding the package, if
 	// any.
 	for arch in arch_repos {
-		r.add_pkg_in_arch_repo(repo, arch, pkg)?
+		r.add_pkg_in_arch_repo(repo, arch, pkg)!
 	}
 
 	return arch_repos
@@ -128,24 +128,24 @@ fn (r &RepoGroupManager) add_pkg_in_repo(repo string, pkg &package.Pkg) ?[]strin
 // arch-repo. It records the package's data in the arch-repo's desc & files
 // files, and afterwards updates the db & files archives to reflect these
 // changes.
-fn (r &RepoGroupManager) add_pkg_in_arch_repo(repo string, arch string, pkg &package.Pkg) ? {
+fn (r &RepoGroupManager) add_pkg_in_arch_repo(repo string, arch string, pkg &package.Pkg) ! {
 	pkg_dir := os.join_path(r.repos_dir, repo, arch, '$pkg.info.name-$pkg.info.version')
 
 	// Remove the previous version of the package, if present
-	r.remove_pkg_from_arch_repo(repo, arch, pkg.info.name, false)?
+	r.remove_pkg_from_arch_repo(repo, arch, pkg.info.name, false)!
 
 	os.mkdir_all(pkg_dir) or { return error('Failed to create package directory.') }
 
-	os.write_file(os.join_path_single(pkg_dir, 'desc'), pkg.to_desc()?) or {
-		os.rmdir_all(pkg_dir)?
+	os.write_file(os.join_path_single(pkg_dir, 'desc'), pkg.to_desc()!) or {
+		os.rmdir_all(pkg_dir)!
 
 		return error('Failed to write desc file.')
 	}
 	os.write_file(os.join_path_single(pkg_dir, 'files'), pkg.to_files()) or {
-		os.rmdir_all(pkg_dir)?
+		os.rmdir_all(pkg_dir)!
 
 		return error('Failed to write files file.')
 	}
 
-	r.sync(repo, arch)?
+	r.sync(repo, arch)!
 }
diff --git a/src/repo/remove.v b/src/repo/remove.v
index add921c..63866a9 100644
--- a/src/repo/remove.v
+++ b/src/repo/remove.v
@@ -5,7 +5,7 @@ import os
 // remove_pkg_from_arch_repo removes a package from an arch-repo's database. It
 // returns false if the package wasn't present in the database. It also
 // optionally re-syncs the repo archives.
-pub fn (r &RepoGroupManager) remove_pkg_from_arch_repo(repo string, arch string, pkg_name string, sync bool) ?bool {
+pub fn (r &RepoGroupManager) remove_pkg_from_arch_repo(repo string, arch string, pkg_name string, sync bool) !bool {
 	repo_dir := os.join_path(r.repos_dir, repo, arch)
 
 	// If the repository doesn't exist yet, the result is automatically false
@@ -15,7 +15,7 @@ pub fn (r &RepoGroupManager) remove_pkg_from_arch_repo(repo string, arch string,
 
 	// We iterate over every directory in the repo dir
 	// TODO filter so we only check directories
-	for d in os.ls(repo_dir)? {
+	for d in os.ls(repo_dir)! {
 		// Because a repository only allows a single version of each package,
 		// we need only compare whether the name of the package is the same,
 		// not the version.
@@ -25,22 +25,22 @@ pub fn (r &RepoGroupManager) remove_pkg_from_arch_repo(repo string, arch string,
 			// We lock the mutex here to prevent other routines from creating a
 			// new archive while we remove an entry
 			lock r.mutex {
-				os.rmdir_all(os.join_path_single(repo_dir, d))?
+				os.rmdir_all(os.join_path_single(repo_dir, d))!
 			}
 
 			// Also remove the package archive
 			repo_pkg_dir := os.join_path(r.pkg_dir, repo, arch)
 
-			archives := os.ls(repo_pkg_dir)?.filter(it.split('-')#[..-3].join('-') == name)
+			archives := os.ls(repo_pkg_dir)!.filter(it.split('-')#[..-3].join('-') == name)
 
 			for archive_name in archives {
 				full_path := os.join_path_single(repo_pkg_dir, archive_name)
-				os.rm(full_path)?
+				os.rm(full_path)!
 			}
 
 			// Sync the db archives if requested
 			if sync {
-				r.sync(repo, arch)?
+				r.sync(repo, arch)!
 			}
 
 			return true
@@ -51,7 +51,7 @@ pub fn (r &RepoGroupManager) remove_pkg_from_arch_repo(repo string, arch string,
 }
 
 // remove_arch_repo removes an arch-repo & its packages.
-pub fn (r &RepoGroupManager) remove_arch_repo(repo string, arch string) ?bool {
+pub fn (r &RepoGroupManager) remove_arch_repo(repo string, arch string) !bool {
 	repo_dir := os.join_path(r.repos_dir, repo, arch)
 
 	// If the repository doesn't exist yet, the result is automatically false
@@ -59,16 +59,16 @@ pub fn (r &RepoGroupManager) remove_arch_repo(repo string, arch string) ?bool {
 		return false
 	}
 
-	os.rmdir_all(repo_dir)?
+	os.rmdir_all(repo_dir)!
 
 	pkg_dir := os.join_path(r.pkg_dir, repo, arch)
-	os.rmdir_all(pkg_dir)?
+	os.rmdir_all(pkg_dir)!
 
 	return true
 }
 
 // remove_repo removes a repo & its packages.
-pub fn (r &RepoGroupManager) remove_repo(repo string) ?bool {
+pub fn (r &RepoGroupManager) remove_repo(repo string) !bool {
 	repo_dir := os.join_path_single(r.repos_dir, repo)
 
 	// If the repository doesn't exist yet, the result is automatically false
@@ -76,10 +76,10 @@ pub fn (r &RepoGroupManager) remove_repo(repo string) ?bool {
 		return false
 	}
 
-	os.rmdir_all(repo_dir)?
+	os.rmdir_all(repo_dir)!
 
 	pkg_dir := os.join_path_single(r.pkg_dir, repo)
-	os.rmdir_all(pkg_dir)?
+	os.rmdir_all(pkg_dir)!
 
 	return true
 }
diff --git a/src/repo/sync.v b/src/repo/sync.v
index 73d21c8..9554748 100644
--- a/src/repo/sync.v
+++ b/src/repo/sync.v
@@ -32,7 +32,7 @@ fn archive_add_entry(archive &C.archive, entry &C.archive_entry, file_path &stri
 }
 
 // sync regenerates the repository archive files.
-fn (r &RepoGroupManager) sync(repo string, arch string) ? {
+fn (r &RepoGroupManager) sync(repo string, arch string) ! {
 	subrepo_path := os.join_path(r.repos_dir, repo, arch)
 
 	lock r.mutex {
@@ -54,7 +54,7 @@ fn (r &RepoGroupManager) sync(repo string, arch string) ? {
 		C.archive_write_open_filename(a_files, &char(files_path.str))
 
 		// Iterate over each directory
-		for d in os.ls(subrepo_path)?.filter(os.is_dir(os.join_path_single(subrepo_path,
+		for d in os.ls(subrepo_path)!.filter(os.is_dir(os.join_path_single(subrepo_path,
 			it))) {
 			// desc
 			mut inner_path := os.join_path_single(d, 'desc')
diff --git a/src/server/api_jobs.v b/src/server/api_jobs.v
new file mode 100644
index 0000000..7795351
--- /dev/null
+++ b/src/server/api_jobs.v
@@ -0,0 +1,49 @@
+module server
+
+import web
+import web.response { new_data_response, new_response }
+
+// v1_poll_job_queue allows agents to poll for new build jobs.
+['/api/v1/jobs/poll'; auth; get]
+fn (mut app App) v1_poll_job_queue() web.Result {
+	arch := app.query['arch'] or {
+		return app.json(.bad_request, new_response('Missing arch query arg.'))
+	}
+
+	max_str := app.query['max'] or {
+		return app.json(.bad_request, new_response('Missing max query arg.'))
+	}
+	max := max_str.int()
+
+	mut out := app.job_queue.pop_n(arch, max).map(it.config)
+
+	return app.json(.ok, new_data_response(out))
+}
+
+// v1_queue_job allows queueing a new one-time build job for the given target.
+['/api/v1/jobs/queue'; auth; post]
+fn (mut app App) v1_queue_job() web.Result {
+	target_id := app.query['target'] or {
+		return app.json(.bad_request, new_response('Missing target query arg.'))
+	}.int()
+
+	arch := app.query['arch'] or {
+		return app.json(.bad_request, new_response('Missing arch query arg.'))
+	}
+
+	if arch == '' {
+		app.json(.bad_request, new_response('Empty arch query arg.'))
+	}
+
+	force := 'force' in app.query
+
+	target := app.db.get_target(target_id) or {
+		return app.json(.bad_request, new_response('Unknown target id.'))
+	}
+
+	app.job_queue.insert(target: target, arch: arch, single: true, now: true, force: force) or {
+		return app.status(.internal_server_error)
+	}
+
+	return app.status(.ok)
+}
diff --git a/src/server/api_logs.v b/src/server/api_logs.v
index 287755a..c7521dd 100644
--- a/src/server/api_logs.v
+++ b/src/server/api_logs.v
@@ -1,7 +1,6 @@
 module server
 
 import web
-import net.http
 import net.urllib
 import web.response { new_data_response, new_response }
 import db
@@ -15,7 +14,7 @@ import models { BuildLog, BuildLogFilter }
 ['/api/v1/logs'; auth; get]
 fn (mut app App) v1_get_logs() web.Result {
 	filter := models.from_params<BuildLogFilter>(app.query) or {
-		return app.json(http.Status.bad_request, new_response('Invalid query parameters.'))
+		return app.json(.bad_request, new_response('Invalid query parameters.'))
 	}
 	logs := app.db.get_build_logs(filter)
 
@@ -25,7 +24,7 @@ fn (mut app App) v1_get_logs() web.Result {
 // v1_get_single_log returns the build log with the given id.
 ['/api/v1/logs/:id'; auth; get]
 fn (mut app App) v1_get_single_log(id int) web.Result {
-	log := app.db.get_build_log(id) or { return app.not_found() }
+	log := app.db.get_build_log(id) or { return app.status(.not_found) }
 
 	return app.json(.ok, new_data_response(log))
 }
@@ -33,7 +32,7 @@ fn (mut app App) v1_get_single_log(id int) web.Result {
 // v1_get_log_content returns the actual build log file for the given id.
 ['/api/v1/logs/:id/content'; auth; get]
 fn (mut app App) v1_get_log_content(id int) web.Result {
-	log := app.db.get_build_log(id) or { return app.not_found() }
+	log := app.db.get_build_log(id) or { return app.status(.not_found) }
 	file_name := log.start_time.custom_format('YYYY-MM-DD_HH-mm-ss')
 	full_path := os.join_path(app.conf.data_dir, logs_dir_name, log.target_id.str(), log.arch,
 		file_name)
@@ -43,9 +42,9 @@ fn (mut app App) v1_get_log_content(id int) web.Result {
 
 // parse_query_time unescapes an HTTP query parameter & tries to parse it as a
 // time.Time struct.
-fn parse_query_time(query string) ?time.Time {
-	unescaped := urllib.query_unescape(query)?
-	t := time.parse(unescaped)?
+fn parse_query_time(query string) !time.Time {
+	unescaped := urllib.query_unescape(query)!
+	t := time.parse(unescaped)!
 
 	return t
 }
@@ -57,25 +56,25 @@ fn (mut app App) v1_post_log() web.Result {
 	start_time_int := app.query['startTime'].int()
 
 	if start_time_int == 0 {
-		return app.json(http.Status.bad_request, new_response('Invalid or missing start time.'))
+		return app.json(.bad_request, new_response('Invalid or missing start time.'))
 	}
 	start_time := time.unix(start_time_int)
 
 	end_time_int := app.query['endTime'].int()
 
 	if end_time_int == 0 {
-		return app.json(http.Status.bad_request, new_response('Invalid or missing end time.'))
+		return app.json(.bad_request, new_response('Invalid or missing end time.'))
 	}
 	end_time := time.unix(end_time_int)
 
 	if 'exitCode' !in app.query {
-		return app.json(http.Status.bad_request, new_response('Missing exit code.'))
+		return app.json(.bad_request, new_response('Missing exit code.'))
 	}
 
 	exit_code := app.query['exitCode'].int()
 
 	if 'arch' !in app.query {
-		return app.json(http.Status.bad_request, new_response("Missing parameter 'arch'."))
+		return app.json(.bad_request, new_response("Missing parameter 'arch'."))
 	}
 
 	arch := app.query['arch']
@@ -83,7 +82,7 @@ fn (mut app App) v1_post_log() web.Result {
 	target_id := app.query['target'].int()
 
 	if !app.db.target_exists(target_id) {
-		return app.json(http.Status.bad_request, new_response('Unknown target.'))
+		return app.json(.bad_request, new_response('Unknown target.'))
 	}
 
 	// Store log in db
@@ -105,7 +104,7 @@ fn (mut app App) v1_post_log() web.Result {
 		os.mkdir_all(repo_logs_dir) or {
 			app.lerror("Couldn't create dir '$repo_logs_dir'.")
 
-			return app.json(http.Status.internal_server_error, new_response('An error occured while processing the request.'))
+			return app.status(.internal_server_error)
 		}
 	}
 
@@ -117,10 +116,10 @@ fn (mut app App) v1_post_log() web.Result {
 		util.reader_to_file(mut app.reader, length.int(), full_path) or {
 			app.lerror('An error occured while receiving logs: $err.msg()')
 
-			return app.json(http.Status.internal_server_error, new_response('Failed to upload logs.'))
+			return app.status(.internal_server_error)
 		}
 	} else {
-		return app.status(http.Status.length_required)
+		return app.status(.length_required)
 	}
 
 	return app.json(.ok, new_data_response(log_id))
diff --git a/src/server/api_targets.v b/src/server/api_targets.v
index 6f284af..cd5cb0a 100644
--- a/src/server/api_targets.v
+++ b/src/server/api_targets.v
@@ -1,7 +1,6 @@
 module server
 
 import web
-import net.http
 import web.response { new_data_response, new_response }
 import db
 import models { Target, TargetArch, TargetFilter }
@@ -10,19 +9,19 @@ import models { Target, TargetArch, TargetFilter }
 ['/api/v1/targets'; auth; get]
 fn (mut app App) v1_get_targets() web.Result {
 	filter := models.from_params<TargetFilter>(app.query) or {
-		return app.json(http.Status.bad_request, new_response('Invalid query parameters.'))
+		return app.json(.bad_request, new_response('Invalid query parameters.'))
 	}
-	repos := app.db.get_targets(filter)
+	targets := app.db.get_targets(filter)
 
-	return app.json(.ok, new_data_response(repos))
+	return app.json(.ok, new_data_response(targets))
 }
 
 // v1_get_single_target returns the information for a single target.
 ['/api/v1/targets/:id'; auth; get]
 fn (mut app App) v1_get_single_target(id int) web.Result {
-	repo := app.db.get_target(id) or { return app.not_found() }
+	target := app.db.get_target(id) or { return app.status(.not_found) }
 
-	return app.json(.ok, new_data_response(repo))
+	return app.json(.ok, new_data_response(target))
 }
 
 // v1_post_target creates a new target from the provided query string.
@@ -30,30 +29,36 @@ fn (mut app App) v1_get_single_target(id int) web.Result {
 fn (mut app App) v1_post_target() web.Result {
 	mut params := app.query.clone()
 
-	// If a repo is created without specifying the arch, we assume it's meant
+	// If a target is created without specifying the arch, we assume it's meant
 	// for the default architecture.
-	if 'arch' !in params {
+	if 'arch' !in params || params['arch'] == '' {
 		params['arch'] = app.conf.default_arch
 	}
 
-	new_repo := models.from_params<Target>(params) or {
-		return app.json(http.Status.bad_request, new_response(err.msg()))
+	mut new_target := models.from_params<Target>(params) or {
+		return app.json(.bad_request, new_response(err.msg()))
 	}
 
 	// Ensure someone doesn't submit an invalid kind
-	if new_repo.kind !in models.valid_kinds {
-		return app.json(http.Status.bad_request, new_response('Invalid kind.'))
+	if new_target.kind !in models.valid_kinds {
+		return app.json(.bad_request, new_response('Invalid kind.'))
 	}
 
-	id := app.db.add_target(new_repo)
+	id := app.db.add_target(new_target)
+	new_target.id = id
 
-	return app.json(http.Status.ok, new_data_response(id))
+	// Add the target to the job queue
+	// TODO return better error here if it's the cron schedule that's incorrect
+	app.job_queue.insert_all(new_target) or { return app.status(.internal_server_error) }
+
+	return app.json(.ok, new_data_response(id))
 }
 
 // v1_delete_target removes a given target from the server's list.
 ['/api/v1/targets/:id'; auth; delete]
 fn (mut app App) v1_delete_target(id int) web.Result {
 	app.db.delete_target(id)
+	app.job_queue.invalidate(id)
 
 	return app.status(.ok)
 }
@@ -69,5 +74,10 @@ fn (mut app App) v1_patch_target(id int) web.Result {
 		app.db.update_target_archs(id, arch_objs)
 	}
 
-	return app.status(.ok)
+	target := app.db.get_target(id) or { return app.status(.internal_server_error) }
+
+	app.job_queue.invalidate(id)
+	app.job_queue.insert_all(target) or { return app.status(.internal_server_error) }
+
+	return app.json(.ok, new_data_response(target))
 }
diff --git a/src/server/cli.v b/src/server/cli.v
index 6fd09c5..2fede6c 100644
--- a/src/server/cli.v
+++ b/src/server/cli.v
@@ -1,16 +1,18 @@
 module server
 
 import cli
-import vieter_v.conf as vconf
+import conf as vconf
 
 struct Config {
 pub:
-	log_level    string = 'WARN'
-	pkg_dir      string
-	data_dir     string
-	api_key      string
-	default_arch string
-	port         int = 8000
+	log_level       string = 'WARN'
+	pkg_dir         string
+	data_dir        string
+	api_key         string
+	default_arch    string
+	global_schedule string = '0 3'
+	port            int    = 8000
+	base_image      string = 'archlinux:base-devel'
 }
 
 // cmd returns the cli submodule that handles starting the server
@@ -18,11 +20,11 @@ pub fn cmd() cli.Command {
 	return cli.Command{
 		name: 'server'
 		description: 'Start the Vieter server.'
-		execute: fn (cmd cli.Command) ? {
-			config_file := cmd.flags.get_string('config-file')?
-			conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)?
+		execute: fn (cmd cli.Command) ! {
+			config_file := cmd.flags.get_string('config-file')!
+			conf := vconf.load<Config>(prefix: 'VIETER_', default_path: config_file)!
 
-			server(conf)?
+			server(conf)!
 		}
 	}
 }
diff --git a/src/server/server.v b/src/server/server.v
index 9903cea..74b1f37 100644
--- a/src/server/server.v
+++ b/src/server/server.v
@@ -6,6 +6,8 @@ import log
 import repo
 import util
 import db
+import build { BuildJobQueue }
+import cron.expression
 
 const (
 	log_file_name = 'vieter.log'
@@ -20,16 +22,39 @@ pub:
 	conf Config [required; web_global]
 pub mut:
 	repo repo.RepoGroupManager [required; web_global]
-	db   db.VieterDb
+	// Keys are the various architectures for packages
+	job_queue BuildJobQueue [required; web_global]
+	db        db.VieterDb
+}
+
+// init_job_queue populates a fresh job queue with all the targets currently
+// stored in the database.
+fn (mut app App) init_job_queue() ! {
+	// Initialize build queues
+	mut targets := app.db.get_targets(limit: 25)
+	mut i := u64(0)
+
+	for targets.len > 0 {
+		for target in targets {
+			app.job_queue.insert_all(target)!
+		}
+
+		i += 25
+		targets = app.db.get_targets(limit: 25, offset: i)
+	}
 }
 
 // server starts the web server & starts listening for requests
-pub fn server(conf Config) ? {
+pub fn server(conf Config) ! {
 	// Prevent using 'any' as the default arch
 	if conf.default_arch == 'any' {
 		util.exit_with_message(1, "'any' is not allowed as the value for default_arch.")
 	}
 
+	global_ce := expression.parse_expression(conf.global_schedule) or {
+		util.exit_with_message(1, 'Invalid global cron expression: $err.msg()')
+	}
+
 	// Configure logger
 	log_level := log.level_from_tag(conf.log_level) or {
 		util.exit_with_message(1, 'Invalid log level. The allowed values are FATAL, ERROR, WARN, INFO & DEBUG.')
@@ -71,11 +96,17 @@ pub fn server(conf Config) ? {
 		util.exit_with_message(1, 'Failed to initialize database: $err.msg()')
 	}
 
-	web.run(&App{
+	mut app := &App{
 		logger: logger
 		api_key: conf.api_key
 		conf: conf
 		repo: repo
 		db: db
-	}, conf.port)
+		job_queue: build.new_job_queue(global_ce, conf.base_image)
+	}
+	app.init_job_queue() or {
+		util.exit_with_message(1, 'Failed to inialize job queue: $err.msg()')
+	}
+
+	web.run(app, conf.port)
 }
diff --git a/src/util/stream.v b/src/util/stream.v
index 06397aa..15cc618 100644
--- a/src/util/stream.v
+++ b/src/util/stream.v
@@ -5,7 +5,7 @@ import io
 import os
 
 // reader_to_writer tries to consume the entire reader & write it to the writer.
-pub fn reader_to_writer(mut reader io.Reader, mut writer io.Writer) ? {
+pub fn reader_to_writer(mut reader io.Reader, mut writer io.Writer) ! {
 	mut buf := []u8{len: 10 * 1024}
 
 	for {
@@ -21,8 +21,8 @@ pub fn reader_to_writer(mut reader io.Reader, mut writer io.Writer) ? {
 }
 
 // reader_to_file writes the contents of a BufferedReader to a file
-pub fn reader_to_file(mut reader io.BufferedReader, length int, path string) ? {
-	mut file := os.create(path)?
+pub fn reader_to_file(mut reader io.BufferedReader, length int, path string) ! {
+	mut file := os.create(path)!
 	defer {
 		file.close()
 	}
@@ -69,11 +69,11 @@ pub fn match_array_in_array<T>(a1 []T, a2 []T) int {
 
 // read_until_separator consumes an io.Reader until it encounters some
 // separator array. The data read is stored inside the provided res array.
-pub fn read_until_separator(mut reader io.Reader, mut res []u8, sep []u8) ? {
+pub fn read_until_separator(mut reader io.Reader, mut res []u8, sep []u8) ! {
 	mut buf := []u8{len: sep.len}
 
 	for {
-		c := reader.read(mut buf)?
+		c := reader.read(mut buf)!
 		res << buf[..c]
 
 		match_len := match_array_in_array(buf[..c], sep)
@@ -84,7 +84,7 @@ pub fn read_until_separator(mut reader io.Reader, mut res []u8, sep []u8) ? {
 
 		if match_len > 0 {
 			match_left := sep.len - match_len
-			c2 := reader.read(mut buf[..match_left])?
+			c2 := reader.read(mut buf[..match_left])!
 			res << buf[..c2]
 
 			if buf[..c2] == sep[match_len..] {
diff --git a/src/util/util.v b/src/util/util.v
index 4cd374e..213104c 100644
--- a/src/util/util.v
+++ b/src/util/util.v
@@ -23,7 +23,7 @@ pub fn exit_with_message(code int, msg string) {
 }
 
 // hash_file returns the sha256 hash of a given file
-pub fn hash_file(path &string) ?string {
+pub fn hash_file(path &string) !string {
 	file := os.open(path) or { return error('Failed to open file.') }
 
 	mut sha256sum := sha256.new()
@@ -39,7 +39,7 @@ pub fn hash_file(path &string) ?string {
 
 		// This function never actually fails, but returns an option to follow
 		// the Writer interface.
-		sha256sum.write(buf[..bytes_read])?
+		sha256sum.write(buf[..bytes_read])!
 	}
 
 	return sha256sum.checksum().hex()
diff --git a/src/web/logging.v b/src/web/logging.v
index fc697ff..12b07d7 100644
--- a/src/web/logging.v
+++ b/src/web/logging.v
@@ -3,33 +3,33 @@ module web
 import log
 
 // log reate a log message with the given level
-pub fn (mut ctx Context) log(msg &string, level log.Level) {
+pub fn (mut ctx Context) log(msg string, level log.Level) {
 	lock ctx.logger {
 		ctx.logger.send_output(msg, level)
 	}
 }
 
 // lfatal create a log message with the fatal level
-pub fn (mut ctx Context) lfatal(msg &string) {
+pub fn (mut ctx Context) lfatal(msg string) {
 	ctx.log(msg, log.Level.fatal)
 }
 
 // lerror create a log message with the error level
-pub fn (mut ctx Context) lerror(msg &string) {
+pub fn (mut ctx Context) lerror(msg string) {
 	ctx.log(msg, log.Level.error)
 }
 
 // lwarn create a log message with the warn level
-pub fn (mut ctx Context) lwarn(msg &string) {
+pub fn (mut ctx Context) lwarn(msg string) {
 	ctx.log(msg, log.Level.warn)
 }
 
 // linfo create a log message with the info level
-pub fn (mut ctx Context) linfo(msg &string) {
+pub fn (mut ctx Context) linfo(msg string) {
 	ctx.log(msg, log.Level.info)
 }
 
 // ldebug create a log message with the debug level
-pub fn (mut ctx Context) ldebug(msg &string) {
+pub fn (mut ctx Context) ldebug(msg string) {
 	ctx.log(msg, log.Level.debug)
 }
diff --git a/src/web/parse.v b/src/web/parse.v
index ee7a72c..7af635f 100644
--- a/src/web/parse.v
+++ b/src/web/parse.v
@@ -8,7 +8,7 @@ import net.http
 const attrs_to_ignore = ['auth']
 
 // Parsing function attributes for methods and path.
-fn parse_attrs(name string, attrs []string) ?([]http.Method, string) {
+fn parse_attrs(name string, attrs []string) !([]http.Method, string) {
 	if attrs.len == 0 {
 		return [http.Method.get], '/$name'
 	}
@@ -61,7 +61,7 @@ fn parse_query_from_url(url urllib.URL) map[string]string {
 }
 
 // Extract form data from an HTTP request.
-fn parse_form_from_request(request http.Request) ?(map[string]string, map[string][]http.FileData) {
+fn parse_form_from_request(request http.Request) !(map[string]string, map[string][]http.FileData) {
 	mut form := map[string]string{}
 	mut files := map[string][]http.FileData{}
 	if request.method in methods_with_form {
diff --git a/src/web/web.v b/src/web/web.v
index 1d1480f..565baff 100644
--- a/src/web/web.v
+++ b/src/web/web.v
@@ -24,7 +24,7 @@ pub:
 pub mut:
 	// TCP connection to client.
 	// But beware, do not store it for further use, after request processing web will close connection.
-	conn &net.TcpConn
+	conn &net.TcpConn = unsafe { nil }
 	// Gives access to a shared logger object
 	logger shared log.Log
 	// time.ticks() from start of web connection handle.
@@ -67,20 +67,20 @@ struct Route {
 pub fn (ctx Context) before_request() {}
 
 // send_string writes the given string to the TCP connection socket.
-fn (mut ctx Context) send_string(s string) ? {
-	ctx.conn.write(s.bytes())?
+fn (mut ctx Context) send_string(s string) ! {
+	ctx.conn.write(s.bytes())!
 }
 
 // send_reader reads at most `size` bytes from the given reader & writes them
 // to the TCP connection socket. Internally, a 10KB buffer is used, to avoid
 // having to store all bytes in memory at once.
-fn (mut ctx Context) send_reader(mut reader io.Reader, size u64) ? {
+fn (mut ctx Context) send_reader(mut reader io.Reader, size u64) ! {
 	mut buf := []u8{len: 10_000}
 	mut bytes_left := size
 
 	// Repeat as long as the stream still has data
 	for bytes_left > 0 {
-		bytes_read := reader.read(mut buf)?
+		bytes_read := reader.read(mut buf)!
 		bytes_left -= u64(bytes_read)
 
 		mut to_write := bytes_read
@@ -96,20 +96,20 @@ fn (mut ctx Context) send_reader(mut reader io.Reader, size u64) ? {
 // send_custom_response sends the given http.Response to the client. It can be
 // used to overwrite the Context object & send a completely custom
 // http.Response instead.
-fn (mut ctx Context) send_custom_response(resp &http.Response) ? {
-	ctx.send_string(resp.bytestr())?
+fn (mut ctx Context) send_custom_response(resp &http.Response) ! {
+	ctx.send_string(resp.bytestr())!
 }
 
 // send_response_header constructs a valid HTTP response with an empty body &
 // sends it to the client.
-pub fn (mut ctx Context) send_response_header() ? {
+pub fn (mut ctx Context) send_response_header() ! {
 	mut resp := http.new_response(
 		header: ctx.header.join(headers_close)
 	)
 	resp.header.add(.content_type, ctx.content_type)
 	resp.set_status(ctx.status)
 
-	ctx.send_custom_response(resp)?
+	ctx.send_custom_response(resp)!
 }
 
 // send is a convenience function for sending the HTTP response with an empty
@@ -260,13 +260,6 @@ pub fn (mut ctx Context) redirect(url string) Result {
 	return Result{}
 }
 
-// not_found Send an not_found response
-pub fn (mut ctx Context) not_found() Result {
-	ctx.send_custom_response(http_404) or {}
-
-	return Result{}
-}
-
 interface DbInterface {
 	db voidptr
 }
diff --git a/vieter.toml b/vieter.toml
index d3922a4..74a7397 100644
--- a/vieter.toml
+++ b/vieter.toml
@@ -4,11 +4,11 @@ data_dir = "data"
 pkg_dir = "data/pkgs"
 log_level = "DEBUG"
 default_arch = "x86_64"
+arch = "x86_64"
 
 address = "http://localhost:8000"
 
-global_schedule = '* *'
+# global_schedule = '* *'
 api_update_frequency = 2
 image_rebuild_frequency = 1
 max_concurrent_builds = 3
-