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