diff --git a/src/build/queue.v b/src/build/queue.v
index 5d50f34..7902173 100644
--- a/src/build/queue.v
+++ b/src/build/queue.v
@@ -144,7 +144,9 @@ fn (mut q BuildJobQueue) pop_invalid(arch string) {
 // 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 {
-	rlock q.mutex {
+	// Even peek requires a write lock, because pop_invalid can modify the data
+	// structure
+	lock q.mutex {
 		if arch !in q.queues {
 			return none
 		}
diff --git a/src/server/server.v b/src/server/server.v
index 6d18f09..74b1f37 100644
--- a/src/server/server.v
+++ b/src/server/server.v
@@ -36,9 +36,7 @@ fn (mut app App) init_job_queue() ! {
 
 	for targets.len > 0 {
 		for target in targets {
-			for arch in target.arch {
-				app.job_queue.insert(target: target, arch: arch.value)!
-			}
+			app.job_queue.insert_all(target)!
 		}
 
 		i += 25