anchor.diff:    checkInputs = [
       pytestCheckHook
       bson
  -    pytest
  -    pytest-cov
       pyyaml
     ];
   
  
positive.code: , fetchFromGitHub
  , pythonOlder
  , bson
  , pytest
  , pytest-cov
  , pytest-runner
  , pytestCheckHook
  , pyyaml
  , setuptools
  
negative.code:     sha256 = "sha256-Ds8JV2mtLRcKXBvPs84Hdj3MxxqpeV5muKCSlAFCj1A=";
    };
  
    postPatch = ''
      substituteInPlace setup.py \
        --replace "'pytest-runner'" ""
      substituteInPlace setup.cfg \
        --replace "--cov=pymarshal --cov-report=html --cov-report=term" ""
    '';
  
    nativeBuildInputs = [
      setuptools
    ];
  
    propagatedBuildInputs = [
  