These ebuilds come from https://github.com/zabuldon/psix-overlay.
If you have some problems, go to the official site first.
odroidc1-u-boot-tools : Odroid C1 U-Boot ( https://github.com/hardkernel/u-boot )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a psix
For Paludis use this rsync : rsync://gentoo.zugaina.org/psix-portage
If you have a problem : ycarus(-at-)zugaina.org