anchor.diff:  }:
   
   let
  -  pythonocc-core-cadquery = stdenv.mkDerivation {
  +  pythonocc-core-cadquery = toPythonModule (stdenv.mkDerivation {
       pname = "pythonocc-core-cadquery";
       version = "0.18.2";
   
  
positive.code: { lib
  , buildPythonPackage
  , isPy3k
  , pythonOlder
  , pythonAtLeast
  
negative.code:       "-DSMESH_LIB_PATH=${smesh}/lib"
        "-DPYTHONOCC_WRAP_SMESH=TRUE"
      ];
    });
  
  in
    buildPythonPackage rec {
  