anchor.diff:  { stdenv
   , buildPythonPackage
  -, config
   , fetchPyPi
   , isPy3
   , lib
  
positive.code: , html5lib
  , jinja2
  , jsonschema
  , pathlib
  , pathpy
  , pkgs
  , portend
  
negative.code:     terminaltables
      transmissionrpc
      zxcvbn-python
    ];
  
    postPatch = /* Allow using newer dependencies */ ''
  