anchor.diff:          pythonPackages.selenium;
   
       meta = with stdenv.lib; {
  -      maintainers = with maintainers; [ iElectric lovek323 ];
  +      maintainers = with maintainers; [ iElectric lovek323 madjar ];
         platforms = platforms.unix;
       };
     };
  
positive.code: 
  
    py = buildPythonPackage rec {
      name = "py-1.4.20";
  
      src = fetchurl {
        url = "https://pypi.python.org/packages/source/p/py/${name}.tar.gz";
        md5 = "5f1708be5482f3ff6711dfd6cafd45e0";
      };
    };
  
  
negative.code:   };
  
    pytest = buildPythonPackage rec {
      name = "pytest-2.6.2";
  
      src = fetchurl {
        url = "http://pypi.python.org/packages/source/p/pytest/${name}.tar.gz";
        md5 = "0a1735fb1d481ef3864f34678607ba85";
      };
  
      preCheck = ''
        # don't test bash builtins
        rm testing/test_argcomplete.py
      '';
  
      propagatedBuildInputs = [ py ]
  