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