Hello Cabal developers! To keep it short: GHC 7.10.1 RC1 is planned for a release shortly before Xmas, and it would be great if there was a Cabal 1.22.x RC to go along with that. Is it possible for you to get Cabal (the library) in such a state by mid-December (i.e. in 2 weeks from now)? Cheers, hvr