if is_win:
            # sysconfig.get_config_var('EXT_SUFFIX') is .pyd on Windows and need to be forced to .lib
            # Additionally windows built libraries may have a name like VmMngr.cp38-win_amd64.lib
            ext_files = glob.glob(os.path.join(lib_dir, "VmMngr.*pyd"))
            if len(ext_files) == 1: