anchor.diff:  
     ws4py = buildPythonPackage rec {
       name = "ws4py-${version}";
  -  
  +
       version = "git-20130303";
  -  
  +
       src = fetchgit {
         url = "https://github.com/Lawouach/WebSocket-for-Python.git";
         rev = "ace276500ca7e4c357595e3773be151d37bcd6e2";
         sha256 = "04m4m3ncn7g4rb81xg5n28imns7rsq8d2w98gjpaib6vlmyly3g1";
       };
  -  
  +
       # python zip complains about old timestamps
       preConfigure = ''
         find -print0 | xargs -0 touch
       '';
  -  
  +
       # Tests depend on other packages
       doCheck = false;
  -  
  +
       meta = {
         homepage = https://ws4py.readthedocs.org;
         description = "A WebSocket package for Python";
  
positive.code:       name = "${name}.tar.gz";
        sha256 = "1y8lx2j1jrr93mqfb06zg1x5jm9lllw744sb61ib8dagw43nnq3v";
      };
      
      buildInputs = [
        pkgs.pyopenssl pyasn1
      ];
  
negative.code:       homepage = https://github.com/Lokaltog/powerline;
        description = "The ultimate statusline/prompt utility.";
        license = with stdenv.lib.licenses; mit;
        platforms = with stdenv.lib.platforms; all;
      };
    };
  
  