I put together a working AUFS4 kernel and utilities package based on 'linux-current'. First time packaging for Solus, so any suggestions/critiques would be appreciated. Probably the only one left actually using AUFS - it's available if anyone else is looking for it. I'll continue to maintain it if there's enough interest, but really just needed a working kernel and mount utils.
https://bitbucket.org/account/user/solu ... ojects/AUF