Gentoo

If you are running on a Gentoo Based System you can run:

∴ rvm notes

To find out the various dependencies for each ruby.

If you're having issues such as "no such file to load -- auto_gem (LoadError)" with gentoo, run the following to see if it corrects your issues:

∴ unset RUBYOPT; sudo env-update

For further information on this specific issue, please see this gist containing more details.