anchor.diff: -{ stdenv, fetchurl, python, emacsPackages }:
  +{ stdenv, fetchurl, python, emacsPackagesNg }:
   
   stdenv.mkDerivation rec {
     name = "cask-${version}";
  
positive.code:     maintainers = [ maintainers.flexw ];
    };
  
    nativeBuildInputs = [ emacsPackages.emacs python ];
  }
  
negative.code:   };
  
    doCheck = true;
    buildInputs = with emacsPackagesNg; [
      s f dash ansi ecukes servant ert-runner el-mock
      noflet ert-async shell-split-string git package-build
    ];
    buildPhase = ''
      emacs --batch -L . -f batch-byte-compile cask.el cask-cli.el
    '';
  