Hello Joel
Why not try to change the type of Kaseya procedure you are using to install the package instead of running a shell command?
You can do this by going to Agent Procedures, create a new procedure and under Available Procedures, go to installPKG(). Now you can install any package (PKG) file by simply stating the location of that file on the system. You can even add a "sendEmail()" procedure to send out to you when the package has successfully installed. Let me know if you have any questions.
Thanks