diff --git a/PKGBUILD.dev b/PKGBUILD.dev
index 79c7f37..6c5123b 100644
--- a/PKGBUILD.dev
+++ b/PKGBUILD.dev
@@ -11,27 +11,37 @@ makedepends=('git' 'vlang')
 arch=('x86_64' 'aarch64')
 url='https://git.rustybever.be/vieter-v/vieter'
 license=('AGPL3')
-source=("$pkgname::git+https://git.rustybever.be/vieter-v/vieter#branch=dev")
+source=(
+    "${pkgname}::git+https://git.rustybever.be/vieter-v/vieter#branch=dev"
+    "libvieter::git+https://git.rustybever.be/vieter-v/libvieter"
+)
 md5sums=('SKIP')
 provides=('vieter')
 conflicts=('vieter')
 
 pkgver() {
-    cd "$pkgname"
+    cd "${pkgname}"
 
     git describe --long --tags | sed 's/^v//;s/\([^-]*-g\)/r\1/;s/-/./g'
 }
 
 prepare() {
-    export VMODULES="$srcdir/.vmodules"
+    cd "${pkgname}"
 
-    cd "$pkgname/src" && v install
+    # Add the libvieter submodule
+    git submodule init
+    git config submodules.src/libvieter.url "${srcdir}/libvieter"
+    git -c protocol.file.allow=always submodule update
+
+    export VMODULES="${srcdir}/.vmodules"
+
+    cd "${pkgname}/src" && v install
 }
 
 build() {
-    export VMODULES="$srcdir/.vmodules"
+    export VMODULES="${srcdir}/.vmodules"
 
-    cd "$pkgname"
+    cd "${pkgname}"
 
     make prod
 
@@ -42,9 +52,9 @@ build() {
 }
 
 package() {
-    install -dm755 "$pkgdir/usr/bin"
-    install -Dm755 "$pkgname/pvieter" "$pkgdir/usr/bin/vieter"
+    install -dm755 "${pkgdir}/usr/bin"
+    install -Dm755 "${pkgname}/pvieter" "${pkgdir}/usr/bin/vieter"
 
-    install -dm755 "$pkgdir/usr/share/man/man1"
-    install -Dm644 "$pkgname/man"/*.1 "$pkgdir/usr/share/man/man1"
+    install -dm755 "${pkgdir}/usr/share/man/man1"
+    install -Dm644 "${pkgname}/man"/*.1 "${pkgdir}/usr/share/man/man1"
 }
diff --git a/src/cron/expression.c.v b/src/cron/expression.c.v
index 8c574c7..a41ad27 100644
--- a/src/cron/expression.c.v
+++ b/src/cron/expression.c.v
@@ -5,6 +5,7 @@ module cron
 #flag -lvieter
 #include "vieter_cron.h"
 
+[typedef]
 pub struct C.vieter_cron_expression {
 	minutes      &u8
 	hours        &u8
@@ -57,6 +58,7 @@ fn (ce1 Expression) == (ce2 Expression) bool {
 	return true
 }
 
+[typeef]
 struct C.vieter_cron_simple_time {
 	year   int
 	month  int
diff --git a/src/libvieter b/src/libvieter
index 379a05a..11709cc 160000
--- a/src/libvieter
+++ b/src/libvieter
@@ -1 +1 @@
-Subproject commit 379a05a7b6b604c107360e0a679fb3ea5400e02c
+Subproject commit 11709cc611c02a4e9140409a0e81d639522c06f1