diff --git a/.container b/.container
new file mode 100644
index 0000000..f8b818d
--- /dev/null
+++ b/.container
@@ -0,0 +1 @@
+ghcr.io/gardenlinux/repo-debian-snapshot@sha256:03ab0aefa3e63964eafd855cca150f58ceb140023aa9966e05a23c9005a6a790
diff --git a/prepare_source b/prepare_source
index 4ffc1c2..acf7aa4 100644
--- a/prepare_source
+++ b/prepare_source
@@ -1,2 +1,3 @@
 apt_src refpolicy
 apply_patches
+version_suffix=gl0