extra-utils

$ nix-build -A extra-utils
/nix/store/5zrqd7cidzfbsdmh1sn5y848fjlhpiiq-extra-utils

extra-utils is a derivation packaging busybox, dhcpd, and their required libraries. They are modified using patchelf so the content of the derivation is self-sufficient.

It is packaged with the stage-1 init script to create the initrd; it is everything the stage-1 init script can use to do its job.