This is just some hacked together stuff for building a AST2500 BMC SoC image using Nix. No bootloader yet so it only runs in qemu using its ability to boot a kernel directly. This does all sorts of "bad" stuff in terms of how Nixpkgs is used like avoiding copying entire closures and just nuking stuff from the Nix store to minimise image size, which is important given the extreme limitations of size (Talos II has 32 MiB flash, and ideally I'd want to reserve half of that for a golden size, so a budget of 16 MiB for a BMC image).
This was just an experiment for now.