Use vagrant to build whatever version of Ruby you like and chuck it in a deb package.
Script was inspired by jtimberman's blog post but with a fair amount of modifications.
Clone the repo, install vagrant
vagrant up
vagrant ssh
cd /vagrant && ./package-ruby.sh
Then you can copy your .deb file out of the repo root
Copyright © 2012 Goodfilms. First hax John Barton. Released under an MIT Licence.