Ninja OS is built around Arch Linux. We also maintain our own custom repository of packages built from the AUR as used in the project. You can add this repo to any Arch Linux system. copy and past this into the bottom of /etc/pacman.conf
This repo is signed with the NinjaOS key: https://aur.archlinux.org/packages/ninjaos-keyring/
#pick one
[ninjaos]
#http://ninjaos.org/repo/i686/
#http://ninjaos.org/repo/x86_64/