robot_upstart: Nothing starts on startup

edit

I have successfully executed the command

rosrun robot_upstart install myPackage/test.launch

and also

sudo systemctl daemon-reload && systemctl start myPackage

But after I reboot or restart, I can confirm by using rosnode list and rostopic list that the nodes listed in the launch file never start. Starting the launch file using roslaunch works fine so that's not the issue.
Here's the content of test.launch

<launch>
      <node name='node' pkg='myPackgage' type='simple_node' />
      <node name='graph' pkg='rqt_graph' type='rqt_graph' />
</launch>

Update 1: Additional information:
- Starting the service manually doesn't work (even before reboot).

sudo service myPackage start

No error, but nodes don't run.
- Files installed during the robot_upstart install process are still there after reboot.
- There is no log file for robot_upstart in /var/log/
- There's only one user account, and logging into it I can see the packages and environment variables.

Update 2:
I tried launching a couple other nodes and they worked fine. But that one node which receives sensor data still doesn't run. (rqt_graph doesn't run either, but it doesn't matter since it's useless as a daemon.)