diff --git a/examples/ext/lib_test/Makefile b/examples/ext/lib_test/Makefile
index fc6174c..eeffd0f 100644
--- a/examples/ext/lib_test/Makefile
+++ b/examples/ext/lib_test/Makefile
@@ -80,7 +80,7 @@ clean-all: clean
 	rm -rf $(VENV_DIR)
 
 clean:
-	$(MAKE) -C lib_test/ clean
+	$(MAKE) -C lib_test/ clean-all
 	rm -rf $(BUILD_DIR)
 	rm -rf $(DIST_DIR)
 	rm -rf $(PYTHON_ARTIFACTS)