anchor.diff:        };
   
       tests.evalNixOS =
  -      { nixpkgs ? { outPath = pkgs.lib.cleanSource <nixpkgs>; revCount = 1234; shortRev = "abcdef"; } }:
         pkgs.runCommand "eval-nixos" { buildInputs = [ build.x86_64-linux ]; }
           ''
             export NIX_DB_DIR=$TMPDIR
  
positive.code: { nix ? { outPath = ./.; revCount = 1234; shortRev = "abcdef"; }
  , officialRelease ? false
  }:
  
  
negative.code:         ''); # */
  
      tests.evalNixpkgs =
        import <nixpkgs/pkgs/top-level/make-tarball.nix> {
          inherit nixpkgs;
          inherit pkgs;
  