busybox-nix-sandbox-shell : static busybox for sys-apps/nix sandbox needs ( https://www.busybox.net/ )
guix : GNU package manager (nix sibling) ( https://www.gnu.org/software/guix/ )
nix : A purely functional package manager ( https://nixos.org/nix )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a nix-guix
For Paludis use this rsync : rsync://gentoo.zugaina.org/nix-guix-portage
If you have a problem : ycarus(-at-)zugaina.org