diff --git a/ros2nix/__main__.py b/ros2nix/__main__.py
index 70dca62..39d43f9 100644
--- a/ros2nix/__main__.py
+++ b/ros2nix/__main__.py
@@ -1,2 +1,3 @@
+import sys
 from .ros2nix import main
-main()
+sys.exit(main())