anchor.diff:  
   buildPythonPackage rec {
     pname = "scrapy";
  -  version = "2.5.1";
  +  version = "2.6.1";
     disabled = pythonOlder "3.6";
   
     src = fetchPypi {
       inherit version;
       pname = "Scrapy";
  -    sha256 = "13af6032476ab4256158220e530411290b3b934dd602bb6dacacbf6d16141f49";
  +    sha256 = "56fd55a59d0f329ce752892358abee5a6b50b4fc55a40420ea317dc617553827";
     };
   
     nativeBuildInputs = [
  
positive.code: , service-identity
  , sybil
  , testfixtures
  , twisted
  , w3lib
  , zope_interface
  
negative.code:     pyopenssl
      queuelib
      service-identity
      tldextract
      twisted
      w3lib
      zope_interface
  