anchor.diff:  
    #  };
   
  - #  plumbum = buildPythonPackage rec {
  - #    name = "plumbum-1.5.0";
  -
  - #    buildInputs = with self; [ self.six ];
  -
  - #    src = pkgs.fetchurl {
  - #      url = "https://pypi.python.org/packages/source/p/plumbum/${name}.tar.gz";
  - #      sha256 = "b759f9e3b6771dff3332f01bc0683d1a56218f44d97942dabd906a0cd1cfb756";
  - #    };
  - #  };
  +   plumbum = buildPythonPackage rec {
  +     name = "plumbum-1.5.0";
  +
  +     buildInputs = with self; [ self.six ];
  +
  +     src = pkgs.fetchurl {
  +       url = "https://pypi.python.org/packages/source/p/plumbum/${name}.tar.gz";
  +       sha256 = "b759f9e3b6771dff3332f01bc0683d1a56218f44d97942dabd906a0cd1cfb756";
  +     };
  +   };
   
   
    #  polib = buildPythonPackage rec {
  
positive.code:  #  #   };
   #  # });
  
   #  ply = buildPythonPackage (rec {
   #    name = "ply-3.8";
  
   #    src = pkgs.fetchurl {
   #      url = "https://pypi.python.org/packages/source/p/ply/${name}.tar.gz";
   #      sha256 = "e7d1bdff026beb159c9942f7a17e102c375638d9478a7ecd4cc0c76afd8de0b8";
   #    };
  
   #    checkPhase = ''
   #      ${python.interpreter} test/testlex.py
   #      ${python.interpreter} test/testyacc.py
   #    '';
  
   #    # Test suite appears broken
  
   #    meta = {
   #      homepage = http://www.dabeaz.com/ply/;
  
   #      description = "PLY (Python Lex-Yacc), an implementation of the lex and yacc parsing tools for Python";
  
   #      longDescription = ''
   #        PLY is an implementation of lex and yacc parsing tools for Python.
   #        In a nutshell, PLY is nothing more than a straightforward lex/yacc
   #        implementation.  Here is a list of its essential features: It's
   #        implemented entirely in Python; It uses LR-parsing which is
   #        reasonably efficient and well suited for larger grammars; PLY
   #        provides most of the standard lex/yacc features including support for
   #        empty productions, precedence rules, error recovery, and support for
   #        ambiguous grammars; PLY is straightforward to use and provides very
   #        extensive error checking; PLY doesn't try to do anything more or less
   #        than provide the basic lex/yacc functionality.  In other words, it's
   #        not a large parsing framework or a component of some larger system.
   #      '';
  
   #      license = licenses.bsd3;
  
   #      maintainers = [ ];
   #    };
   #  });
  
   #  osc = buildPythonPackage (rec {
   #    name = "osc-0.133+git";
  
negative.code:  #    };
   #  };
  
     certifi = buildPythonPackage rec {
       name = "certifi-${version}";
       version = "2015.9.6.2";
  
       src = pkgs.fetchurl {
         url = "https://pypi.python.org/packages/source/c/certifi/${name}.tar.gz";
         sha256 = "19mfly763c6bzya9dwm6qgc48z4x3gk6ldl6fprdncqhklnjnfnw";
       };
  
       meta = {
         homepage = http://certifi.io/;
         description = "Python package for providing Mozilla's CA Bundle";
         license = licenses.isc;
         maintainers = with maintainers; [ koral ];
       };
     };
  
   #  characteristic = buildPythonPackage rec {
   #    name = "characteristic-14.1.0";
  