anchor.diff:      propagatedBuildInputs = [ six ];
       # AttributeError: 'module' object has no attribute 'collector'
       doCheck = false;
  -  };
  -
  -  nose2Cov = buildPythonPackage rec {
  +  });
  +
  +  nose2Cov = if isPy26 then null else (buildPythonPackage rec {
       name = "nose2-cov-1.0a4";
       src = fetchurl {
         url = "http://pypi.python.org/packages/source/n/nose2-cov/nose2-cov-1.0a4.tar.gz";
  
positive.code:       sha256 = "c0f32fa31e2c5fa42f5cc19f3dba4e73f0438bf36bf756ba137f2423c0ac4637";
      };
  
      propagatedBuildInputs = [ oauth2 urwid tweepy ] ++
                              (if python.majorVersion == "2.6" then [ argparse ]
                                                               else []);
  
      #buildInputs = [ tox ];
      # needs tox
  
negative.code:       sha256 = "0bhiyx41kilvy04cgjbvjy2r4b6l7zz31fbrg3l6lvnqm26nihb0";
      };
  
      buildInputs = [ pkgs.setuptools ] ++ (optional isPy26 argparse);
  
      meta = {
        description = "automatically generated zsh completion function for Python's option parser modules";
  