anchor.diff:  { stdenv
   , buildPythonPackage
   , fetchPyPi
  +, lib
   
   , html5lib
   , six
   }:
   
   let
  -  version = "1.5.0";
  +  version = "2.0.0";
   in
   buildPythonPackage {
     name = "bleach-${version}";
  
positive.code:   ];
  
    postPatch = ''
      sed -i '/html5lib/ s/\(,\|\)\(!\|>\|<\|=\)\(=\|\)[0-9.]\+//g' setup.py bleach.egg-info/requires.txt
    '';
  
    meta = with stdenv.lib; {
      maintainers = with maintainers; [
        wkennington
      ];
  
negative.code:   src = fetchPyPi {
      package = "bleach";
      inherit version;
      sha256 = "b9522130003e4caedf4f00a39c120a906dcd4242329c1c8f621f5370203cbc30";
    };
  
    propagatedBuildInputs = [
  