anchor.diff:  , buildPythonPackage
   , fetchPyPi
   , isPy3k
  +, lib
   
   , html5lib
   , lxml
   }:
   
   let
  -  inherit (stdenv.lib)
  +  inherit (lib)
       optionals;
   
  -  version = "4.5.1";
  +  version = "4.6.0";
   in
   buildPythonPackage rec {
     name = "beautifulsoup-${version}";
  
positive.code:   src = fetchPyPi {
      package = "beautifulsoup4";
      inherit version;
      sha256 = "3c9474036afda9136aac6463def733f81017bf9ef3510d25634f335b0c87f5e1";
    };
  
    propagatedBuildInputs = [
  
negative.code:   # Not all tests have been converted to Python 3
    doCheck = !isPy3k;
  
    meta = with lib; {
      description = "HTML/XML parser";
      homepage = http://www.crummy.com/software/BeautifulSoup/;
      license = licenses.mit;
  