anchor.diff:  
   
     pyramid_exclog = buildPythonPackage rec {
  -    name = "pyramid_exclog-0.6";
  +    name = "pyramid_exclog-0.7";
   
       src = fetchurl {
         url = "http://pypi.python.org/packages/source/p/pyramid_exclog/${name}.tar.gz";
  -      md5 = "5c18706f5500605416afff311120c933";
  +      md5 = "05df86758b0d30ee6f8339ff36cef7a0";
       };
   
       propagatedBuildInputs = [ pyramid ];
  
positive.code: 
  
    colander = buildPythonPackage rec {
      name = "colander-1.0a5";
  
      src = fetchurl {
        url = "http://pypi.python.org/packages/source/c/colander/${name}.tar.gz";
        md5 = "569dea523561f5d94338ef9d9a98d249";
      };
  
      propagatedBuildInputs = [ pythonPackages.translationstring ];
  
negative.code: 
  
    flake8 = buildPythonPackage (rec {
      name = "flake8-2.1.0";
  
      src = fetchurl {
        url = "http://pypi.python.org/packages/source/f/flake8/${name}.tar.gz";
        md5 = "cf326cfb88a1db6c5b29a3a6d9efb257";
      };
  
      buildInputs = [ nose mock ];
      propagatedBuildInputs = [ pyflakes pep8 mccabe ];
  
      # 3 failing tests
  