firejail : a SUID sandbox program using linux namespaces ( https://l3net.wordpress.com/projects/firejail/ )
firetools : Graphical user interface of app-emulation/firejail ( https://l3net.wordpress.com/projects/firejail )
fjinit : process reaper intended for use as init-system in app-emulation/firejail ( https://github.com/ScoreUnder/fjinit )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a virtualization
For Paludis use this rsync : rsync://gentoo.zugaina.org/virtualization-portage
If you have a problem : ycarus(-at-)zugaina.org