diff --git a/.container b/.container
new file mode 100644
index 0000000..91dd1cb
--- /dev/null
+++ b/.container
@@ -0,0 +1 @@
+ghcr.io/gardenlinux/repo-debian-snapshot@sha256:44a68d1ca590568dbe3927c4acf4f47c7013f3b42685535ad72e3cbb4c0a96a5
diff --git a/prepare_source b/prepare_source
index baec576..0b1a62e 100644
--- a/prepare_source
+++ b/prepare_source
@@ -1 +1,2 @@
 git_src --branch debian/2.9.5-3 https://salsa.debian.org/sssd-team/sssd.git
+version_suffix=gl0