Can't manually install Airtime on Gentoo

Hi!

I already use Liquidsoap, and I thought I'd like to check out Airtime. Unfortunately, I can't even install it manually on my Gentoo server because the install script expects only an Ubuntu system layout (grep: /etc/apt/sources.list: No such file or directory, for example).

Is there any way to do this? This page - http://www.sourcefabric.org/en/airtime/download/ - says one can install Airtime on non-supported systems, but the linked manual install instructions simply don't work. I've searched, both on and off this site, for "airtime Gentoo", with no relevant results.

Thanks,
Damien