I am building a package for Puppet facter. The installation of puppet facter is as follows:

1. make sure ruby is installed on the OS
2. run `ruby install.rb`

So I'd like to make a Debian package out of it. What should the contents of my debian/rules file be? The following does not work (creates a .deb that is empty):

```
#!/usr/bin/gmake -f
%:
    dh $@

override_dh_install:
    ruby install.rb

```