diff --git a/nix/nixosProfiles/common.nix b/nix/nixosProfiles/common.nix
index 8a5b638..c382a94 100644
--- a/nix/nixosProfiles/common.nix
+++ b/nix/nixosProfiles/common.nix
@@ -141,6 +141,7 @@ in
 
     };
 
+    # TODO upstream
     system.activationScripts.diff = {
       supportsDryActivation = true;
       text = ''