Add debmirror package
diff --git a/classes/cluster/mcp-offline/infra/aptly.yml b/classes/cluster/mcp-offline/infra/aptly.yml
index 7e66115..3dceed2 100644
--- a/classes/cluster/mcp-offline/infra/aptly.yml
+++ b/classes/cluster/mcp-offline/infra/aptly.yml
@@ -451,6 +451,8 @@
       package:
         cloud-init:
           version: latest
+        debmirror:
+          version: latest
     network:
       host:
         apt: