distrobuilder : System container image builder for LXC and LXD ( https://linuxcontainers.org/distrobuilder/introduction/ )
nsexec-lbthomsen : Utilities for non-root LXC containers ( https://github.com/lbthomsen/nsexec )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a einflay
For Paludis use this rsync : rsync://gentoo.zugaina.org/einflay-portage
If you have a problem : ycarus(-at-)zugaina.org