Proof of it not working when the env var is not set: dash@dash:~/99robotics$ echo $CATKIN_SETUP_UTIL_ARGS --extend dash@dash:~/99robotics$ echo $CATKIN_SETUP_UTIL_ARGS ^C dash@dash:~/99robotics$ export ^C dash@dash:~/99robotics$ echo $CATKIN_SETUP_UTIL_ARGS --extend dash@dash:...