anchor.diff:  , six
   , typing-extensions
   , pytestCheckHook
  -, pytestrunner
   , nbval
   , tabulate
   }:
  
positive.code: 
    checkInputs = [
      pytestCheckHook
      pytestrunner
      nbval
      tabulate
    ];
  
negative.code:   postPatch = ''
      chmod +x tools/protoc-gen-mypy.sh.in
      patchShebangs tools/protoc-gen-mypy.sh.in tools/protoc-gen-mypy.py
  
      substituteInPlace setup.py \
        --replace "setup_requires.append('pytest-runner')" ""
    '';
  
    preBuild = ''
  