with pyrite64 out for homebrew and only gonna get better, maybe N64Bag could be a thing? It needs accurate emulator (gopher64 is gpl, ares is something like a modified zlib license) but i am sure a fork could be made of one of those emulators to allow packaging like nesbag and gbcbag.
something to think about anyways, i dunno if you have any interest in n64 dev.