These ebuilds come from http://arcong.ath.cx/.
If you have some problems, go to the official site first.
ois : Object-oriented Input System - A cross-platform C++ input handling library ( http://www.wreckedgames.com/wiki/index.php/WreckedLibs:OIS )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a zugaina
For Paludis use this rsync : rsync://gentoo.zugaina.org/zugaina-portage
If you have a problem : ycarus(-at-)zugaina.org