anchor.diff:  { stdenv, fetchFromGitHub, phantomjs, python, nodePackages }:
   
  -let version = "1.0.0-RC5";
  +let version = "1.1.1";
   
   in stdenv.mkDerivation rec {
   
  
positive.code:   '';
  
    dontBuild = true;
  
    installPhase = ''
      mv $PWD $out
  
negative.code:     owner = "casperjs";
      repo = "casperjs";
      rev = version;
      sha256 = "187prrm728xpn0nx9kxfxa4fwd7w25z78nsxfk6a6kl7c5656jpz";
    };
  
    buildInputs = [ phantomjs python nodePackages.eslint ];
  