--- a/python/mozbuild/mozbuild/configure/__init__.py

+++ b/python/mozbuild/mozbuild/configure/__init__.py

@@ -491,7 +491,8 @@ class ConfigureSandbox(dict):

             if self._help:

                 self._logger.warning(msg)

             else:

-                raise InvalidOptionError(msg)

+                #raise InvalidOptionError(msg)

+                pass

         # Run the execution queue

         for func, args in self._execution_queue: