<red>Nginx module sources not available</red>

You didn't install the Phusion Passenger Nginx module sources. If you're on
Debian or Ubuntu, please run <b>sudo apt-get install ruby-passenger-dev</b>
first. If you're not on Debian/Ubuntu, or if you cannot run apt-get, please
install Phusion Passenger from source: https://www.phusionpassenger.com/