diff --git a/.container b/.container
new file mode 100644
index 0000000..3e01ac7
--- /dev/null
+++ b/.container
@@ -0,0 +1 @@
+ghcr.io/gardenlinux/repo-debian-snapshot@sha256:d6101601e920ffe449200cb239fc55b00ee8153035bffc1c3a7d8597118fc578
diff --git a/prepare_source b/prepare_source
index 429a6d4..1929235 100644
--- a/prepare_source
+++ b/prepare_source
@@ -3,3 +3,4 @@ apt_src containerd
 # patch 
 cp -r patches/remove-limitnofile.patch "$dir/src/debian/patches/"
 echo remove-limitnofile.patch >> "$dir/src/debian/patches/series"
+version_suffix=gl0