Inspired by [debuerreotype](https://github.com/debuerreotype/debuerreotype) which use Debian ["wayback machine"](http://snapshot.debian.org/) to create reproducible rootfs. We can do the same by using the [Arch Linux Archive](https://wiki.archlinux.org/index.php/Arch_Linux_Archive). In theory we can even avoid storing the rootfs and just build it on-demand in the Dockerfile.