.PHONY: clean
 clean:
-       $(RM) build dist MANIFEST venv
-       $(RM) $(NAME).egg-info $(NAME)/_isl.*.so $(NAME)/__pycache__
-       $(RM) tests/__pycache__
+       $(RM) build dist MANIFEST venv $(NAME).egg-info
+       $(RM) $(NAME)/_islhelper.*.so $(NAME)/__pycache__ $(NAME)/tests/__pycache__