It was a fun challenge and people said it wasn't possible so I wanted to do it. Ended up getting there with gentoo crossdev and then I was satisfied because I'd pulled it off

But cross comp didn't really seem to serve any practical purpose aside from the particular task of bootstrapping nix, and I couldn't figure out the nixpkgs internals enough to try

My interest in nix on illumos was mostly as an alternative to pkgsrc, in the role of auxiliary package repository