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