diff --git a/PKGBUILD b/PKGBUILD
index 80ee806f4e9e..7913bb2c320f 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -34,6 +34,7 @@ sha256sums=(
 _PREFIX="/usr"
 prepare() {
 	cd "${srcdir}/nextpnr"
+	git submodule update --init
 	[ ! -d "${srcdir}/nextpnr/build-generic" ] && mkdir build-generic
 }
 
diff --git a/PKGBUILD.in b/PKGBUILD.in
index ec141b0320e7..15d2a7d9540a 100644
--- a/PKGBUILD.in
+++ b/PKGBUILD.in
@@ -34,6 +34,7 @@ sha256sums=(
 _PREFIX="/usr"
 prepare() {
 	cd "${srcdir}/nextpnr"
+	git submodule update --init
 	[ ! -d "${srcdir}/nextpnr/build-generic" ] && mkdir build-generic
 }