i've already explored that part too though - a baseline bootable chimera system contains exactly zero gnu components
at build time, we require gnu make to have the system bootstrap self from source; to build enough for a bootable system, we also require the components that make up gnu autotools, plus some supplementary stuff (the only one that comes to mind right now is gnu m4)
so you'd be replicating basically that; the above, afaict, can not be eliminated