diff --git a/flake.nix b/flake.nix
index 1c5da66..0e3b5d4 100644
--- a/flake.nix
+++ b/flake.nix
@@ -111,8 +111,8 @@
         {
           _module.args.secret = lib'.loadSecrets secret;
           _module.args.vars = {
-            flake_rev = self.rev;
-            flake_sha = self.narHash;
+            flake_rev = self.rev or (lib'.warn "No flake revision available, do not deploy containers!" "");
+            flake_sha = self.narHash or (lib'.warn "No flake nar hash available, do not deploy containers!" "");
             flake_ref = "master";
             flake_host = "git+https://git.sr.ht/~magic_rb/dotfiles-2.0";
           };