anchor.diff:  , itemloaders
   , jmespath
   , lxml
  +, packaging
   , parsel
   , protego
   , pydispatcher
  
positive.code:   src = fetchPypi {
      inherit version;
      pname = "Scrapy";
      hash = "sha256-vf8arzVHwuVAQ206uGgLIQOTJ71dOi74nDQWWZLT5fM=";
    };
  
    nativeBuildInputs = [
  
negative.code: 
  buildPythonPackage rec {
    pname = "scrapy";
    version = "2.7.0";
    format = "setuptools";
  
    disabled = pythonOlder "3.7";
  