anchor.diff:  
   buildPythonPackage rec {
     pname = "scrapy";
  -  version = "2.6.1";
  +  version = "2.6.2";
     format = "setuptools";
   
     disabled = pythonOlder "3.6";
  
positive.code:   src = fetchPypi {
      inherit version;
      pname = "Scrapy";
      sha256 = "56fd55a59d0f329ce752892358abee5a6b50b4fc55a40420ea317dc617553827";
    };
  
    nativeBuildInputs = [
  
negative.code:   ] ++ lib.optionals stdenv.isDarwin [
      "test_xmliter_encoding"
      "test_download"
      "test_reactor_default_twisted_reactor_select"
    ];
  
    postInstall = ''
  