anchor.diff:  
   buildPythonPackage rec {
     pname = "pyhaversion";
  -  version = "20.12.1";
  +  version = "21.3.0";
   
     # Only 3.8.0 and beyond are supported
     disabled = pythonOlder "3.8";
  
positive.code: 
    checkInputs = [
      aresponses
      awesomeversion
      pytest-asyncio
      pytestCheckHook
    ];
  
negative.code:     owner = "ludeeus";
      repo = pname;
      rev = version;
      sha256 = "sha256-2vW4BN5qwJZYQ8FU3bpSA2v1dX6TOhcHDbHRMDPoRAs=";
    };
  
    propagatedBuildInputs = [
  