Seemingly unable to handle 32 bit library needs on 64-bit OS

I was attempting to use nix-autobahn to play the DRM free Humble release of 5d chess with multiverse time travel, after Factorio worked so well (thank you! it's genuinely super amazing that that works), but 5d chess needs at LEAST the 32 bit build of SDL2, if not all its libraries. Is there a possibility of a way for nix-autobahn to handle detecting or at least asking if it should try to get a different architecture's libraries? Steam-run works, but it would be nice to have this within nix-autobahn.

(ps, sorry for the initially blank issue, accidentally hit enter on my laptop midway thru typing the title)