diff --git a/main/libisofs/APKBUILD b/main/libisofs/APKBUILD
index de1a9bd06487bc5167edfba8287c2c6c7ae82902..bdca65435abcfa8cf5a908760ead8c28401e41fc 100644
--- a/main/libisofs/APKBUILD
+++ b/main/libisofs/APKBUILD
@@ -10,6 +10,11 @@ makedepends="acl-dev zlib-dev"
 subpackages="$pkgname-dev"
 source="https://files.libburnia-project.org/releases/libisofs-$pkgver.tar.gz"
 
+prepare() {
+	default_prepare
+	update_config_sub
+}
+
 build() {
 	CFLAGS="$CFLAGS -flto=auto" \
 	./configure \