These ebuilds come from http://github.com/joshuar/ephemeral-gentoo-overlay/tree/master.
If you have some problems, go to the official site first.
ulatencyd : Daemon that controls how the Linux kernel will spend it's resources on the running processes ( https://github.com/poelzi/ulatencyd/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a ephemeral
For Paludis use this rsync : rsync://gentoo.zugaina.org/ephemeral-portage
If you have a problem : ycarus(-at-)zugaina.org