anchor.diff:        url = "https://pypi.python.org/packages/3d/71/3302512282b606ec4d054e09be24c065915518903b29380b6573bff79c24/persistent-4.2.2.tar.gz";
         sha256 = "52ececc6dbba5ef572d3435189318b4dff07675bafa9620e32f785e147c6563c";
       };
  -    propagatedBuildInputs = [
  -      zope_interface
  -    ] ++ (with pythonPackages; [ six wheel ]);
  +    propagatedBuildInputs = with pythonPackages; [ zope_interface six wheel ];
       meta = with stdenv.lib; {
         homepage = "";
         license = licenses.zpt21;
  
positive.code:     propagatedBuildInputs = [
        persistent
        transaction
        zope_interface
      ] ++ (with pythonPackages; [ coverage ]);
  
      meta = with stdenv.lib; {
        homepage = "";
  
negative.code:       description = "Fork of Python 3 pickle module.";
      };
    };
  }
  