anchor.diff:    version = "1.31.0";
     format = "setuptools";
   
  -  disabled = pythonOlder "3.6";
  +  disabled = pythonOlder "3.7";
   
     src = fetchFromGitHub {
       owner = "influxdata";
  
positive.code: { lib
  , buildPythonPackage
  , fetchFromGitHub
  , rx
  
negative.code:     python-dateutil
      setuptools
      urllib3
      pytz
    ];
  
    passthru.optional-dependencies = {
      async = [
        aiohttp
      ];
      ciso = [
        ciso8601
      ];
    };
  
    # requires influxdb server
    doCheck = false;
  