anchor.diff:  , cmarkgfm
   , docutils
   , fetchPypi
  -, future
   , mock
   , pygments
   , pytestCheckHook
  
positive.code:     bleach
      cmarkgfm
      docutils
      future
      pygments
    ];
  
  
negative.code:     mock
      pytestCheckHook
    ];
  
    postPatch = ''
      substituteInPlace setup.py \
        --replace "cmarkgfm>=0.5.0,<0.7.0" "cmarkgfm>=0.5.0,<1"
    '';
  
    pythonImportsCheck = [
      "readme_renderer"
  