anchor.diff:  , fetchFromGitHub
   , buildPythonPackage
   , pytest
  +, pythonOlder
   , xclip
   , xvfb-run
   }:
  
positive.code:       --replace docs/README.md README.md
    '';
  
    checkInputs = [ pytest ] ++ lib.optionals stdenv.isLinux [ xclip xvfb-run ];
  
    checkPhase = ''
      runHook preCheck
  
negative.code: buildPythonPackage rec {
    pname = "pyclip";
    version = "0.6.0";
    format = "setuptools";
  
    disabled = pythonOlder "3.7";
  
    src = fetchFromGitHub {
      owner = "spyoungtech";
      repo = pname;
      rev = "v${version}";
      hash = "sha256-NCWmCp4VGwwvubqN8FUUJ0kcZbXjOEyB6+BfGky1Kj4=";
    };
  
    postPatch = ''
  