anchor.diff:  
     postPatch = ''
       substituteInPlace pytest.ini \
  +      --replace "filterwarnings = error" "" \
         --replace "--cov=aiosignal" ""
     '';
   
  
positive.code:     frozenlist
    ];
  
    # not compatible w ith latest asyncio
    doCheck = false;
    checkInputs = [
      pytest-asyncio
      pytestCheckHook
  
negative.code: 
  buildPythonPackage rec {
    pname = "aiosignal";
    version = "1.2.0";
    disabled = pythonOlder "3.6";
  
    src = fetchFromGitHub {
  