Use nix-locate for command-not-found

common/flakes.nix

@@ -16,6 +16,9 @@ in {
 
       # pin nixpkgs for system commands such as "nix shell"
       registry.nixpkgs.flake = config.inputs.nixpkgs;
+
+      # pin system nixpkgs to the same version as the flake input
+      nixPath = [ "nixpkgs=${config.inputs.nixpkgs}" ];
     };
   };
 }