--- 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: