anchor.diff:      substituteInPlace pyproject.toml \
         --replace 'backoff = "^1.11.1"' 'backoff = "*"' \
         --replace 'requests = ">=2.26.0"' 'requests = "*"' \
  -      --replace 'rich = "^10.6.0"' 'rich = "*"'
  +      --replace 'rich = "^10.16.2"' 'rich = "*"'
       substituteInPlace pytest.ini \
         --replace "--cov" ""
     '';
  
positive.code:     backoff
      requests
      rich
    ] ++ lib.optionals (pythonOlder "3.8") [
      importlib-metadata
    ];
  
  
negative.code: 
  buildPythonPackage rec {
    pname = "censys";
    version = "2.1.1";
    format = "pyproject";
  
    disabled = pythonOlder "3.6";
  