These ebuilds come from http://git.overlays.gentoo.org/gitweb/?p=dev/scarabeus.git.
If you have some problems, go to the official site first.
s2tc : s2tc (non-patented s3tc) texture compression library ( https://github.com/divVerent/s2tc/wiki/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a scarabeus
For Paludis use this rsync : rsync://gentoo.zugaina.org/scarabeus-portage
If you have a problem : ycarus(-at-)zugaina.org