anchor.diff:    ];
   
     checkInputs = [
  -    asynctest
       pytest-asyncio
  -    pytest-cov
       pytest-mock
       pytestCheckHook
  +  ] ++ lib.optionals (pythonOlder "3.8") [
  +    asynctest
     ];
   
     pythonImportsCheck = [ "pyzerproc" ];
  
positive.code: , buildPythonPackage
  , fetchFromGitHub
  , pytest-asyncio
  , pytest-cov
  , pytest-mock
  , pytestCheckHook
  , pythonOlder
  
negative.code: 
  buildPythonPackage rec {
    pname = "pyzerproc";
    version = "0.4.8";
    disabled = pythonOlder "3.6";
  
    src = fetchFromGitHub {
      owner = "emlove";
      repo = pname;
      rev = version;
      sha256 = "sha256-PNvkgjPcBbnETjWpVF3De9O9IprdpCke0nWvJ9Tju1M=";
    };
  
    postPatch = ''
      sed -i "/--cov/d" setup.cfg
    '';
  
    propagatedBuildInputs = [
  