anchor.diff:  
   buildPythonPackage rec {
     pname = "async-dns";
  -  version = "1.1.10";
  +  version = "2.0.0";
     disabled = pythonOlder "3.6";
     format = "pyproject";
   
  
positive.code:   checkPhase = ''
      export HOME=$TMPDIR
      # Test needs network access
      rm tests/test_resolver.py
      ${python.interpreter} -m unittest
    '';
  
  
negative.code:     owner = "gera2ld";
      repo = "async_dns";
      rev = "v${version}";
      sha256 = "0vn7hxvpzikd7q61a27fwzal4lwsra2063awyr6fjpy6lh3cjdwf";
    };
  
    nativeBuildInputs = [
  