Scripts don't see ROS if executed by ProcessBuilder()

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I want to execute a script with a ProcessBuilder(). My code is:

new ProcessBuilder().inheritIO().command("/bin/bash", "-c", "./deploy.sh").start();

In the bash script I have:

#!/bin/bash
rosrun my_package ardrone_test_1.py

It works if I run the bash script manually in the terminal, but if I do with the ProcessBuilder I got an error:

rosrun: command not found

The same if I run python scripts which uses ROS. There are errors that some package are not found, whereas it works fine if run via terminal.