anchor.diff:  
     pythonImportsCheck = [ "lxml" "lxml.etree" ];
   
  -  meta = with stdenv.lib; {
  +  meta = with lib; {
       description = "Pythonic binding for the libxml2 and libxslt libraries";
       homepage = "https://lxml.de";
       license = licenses.bsd3;
  
positive.code: { stdenv, buildPythonPackage, fetchFromGitHub
  , cython
  , libxml2
  , libxslt
  
negative.code: 
  buildPythonPackage rec {
    pname = "lxml";
    version = "4.5.2";
  
    src = fetchFromGitHub {
      owner = pname;
      repo = pname;
      rev = "${pname}-${version}";
      sha256 = "1d0cpwdjxfzwjzmnz066ibzicyj2vhx15qxmm775l8hxqi65xps4";
    };
  
    # setuptoolsBuildPhase needs dependencies to be passed through nativeBuildInputs
  