Building Chocolate Doom on Gentoo
A Chocolate Doom ebuild for Gentoo is located in the Sunrise overlay. Just add the sunrise overlay to your tree:
layman -a sunrise
to your /etc/portage/package.unmask file and emerge Chocolate Doom:
emerge -av chocolate-doom
 Tracking Git
To keep up to date with the latest bleeding-edge version from git repository add
to your /etc/porage/package.keywords file and re-emerge Chocolate Doom. Keep in mind that you need to re-emerge *-9999 ebuilds manually so as to keep them updated.