1 files changed, 2 insertions, 1 deletions
diff --git a/flake.nix b/flake.nix
index b23398a..e92c25b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -15,7 +15,8 @@
               ({config, pkgs, ...}: {
                 # Let 'nixos-version --json' know about the Git revision
                 # of this flake.
-                system.configurationRevision = nixpkgs.lib.mkIf (self ? rev) self.rev;
+                system.configurationRevision =
+                  if self ? rev then self.rev else "DIRTY";
 
                 # Add unstable packages.
                 nixpkgs.overlays = [