anchor.diff:  , buildPythonPackage
   , certifi
   , chardet
  +, charset-normalizer
   , fetchPypi
   , idna
   , pytest-mock
  
positive.code:   '';
  
    propagatedBuildInputs = [
      certifi
      chardet
      idna
      urllib3
  
negative.code:     pytest-mock
      pytest-xdist
      pytestCheckHook
      trustme
    ];
  
    # AttributeError: 'KeywordMapping' object has no attribute 'get'
  