diff --git a/.container b/.container
new file mode 100644
index 0000000..c9161b9
--- /dev/null
+++ b/.container
@@ -0,0 +1 @@
+ghcr.io/gardenlinux/repo-debian-snapshot@sha256:99f72494ab45d33958a0385054de4742c7022ab07b4c0c2cef6f785f8ebfb378
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3e21710..bb7c3e1 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -4,11 +4,15 @@ on:
       - main
       - rel-1877
       - sta-1877
+      - rel-2150
+      - sta-2150
   push:
     branches:
       - main
       - rel-1877
       - sta-1877
+      - rel-2150
+      - sta-2150
   workflow_dispatch:
   schedule:
     - cron: '0 0 * * *'
diff --git a/prepare_source b/prepare_source
index c82d907..9b52c0e 100644
--- a/prepare_source
+++ b/prepare_source
@@ -1,8 +1,8 @@
 # vim: ft=bash
 
 # commit sha from https://github.com/cyberus-technology/libvirt/commits/gardenlinux/
-LIBVIRT_COMMIT_SHA="55976a694dd7db37c110ef583e60a2421d188ccf"
-version_increment="5"
+LIBVIRT_COMMIT_SHA="6896f4dade77f4b73bab6a04a622ef1e1ddaa869"
+version_increment="8"
 
 git_src_commit "$LIBVIRT_COMMIT_SHA" https://github.com/cyberus-technology/libvirt.git
 
@@ -20,6 +20,6 @@ sed "s/SED_MARKER_FOR_COMMIT_SHA/$LIBVIRT_COMMIT_SHA/" <upstream_patches/meson.b
 apply_patches
 import_upstream_patches
 
-version="12.1.0-1"  # current debian base (do not change for rebuilds)
-version_suffix="gl${version_increment}"
+version="12.1.0-1" # current debian base (do not change for rebuilds)
+version_suffix="gl${version_increment}~bp2150"
 message="Update to $version $version_suffix"