diff --git a/.container b/.container
new file mode 100644
index 0000000..376d931
--- /dev/null
+++ b/.container
@@ -0,0 +1 @@
+ghcr.io/gardenlinux/repo-debian-snapshot@sha256:12c680ac9104ed57c5a48b1a62e55699b770a17743b02fa5d0744f386e42b386
diff --git a/prepare_source b/prepare_source
index db6cd78..41424f3 100644
--- a/prepare_source
+++ b/prepare_source
@@ -1 +1,2 @@
 apt_src containerd
+version_suffix=gardenlinux0