Given the PIE breakage in sid, I think at this point it's actually going to be a lot more work to stay with 7.10 in stretch than to go forward with the move to GHC 8.
I also think we should do it as soon as possible so that packages outside the DHG (such as hedgewars-server, git-annex, pandoc) have maximal time to get patched and uploaded. Therefore I plan to start uploading to unstable once haskell-hoogle is patched to not FTBFS, and then any remaining issues can be fixed in sid. Any objections?
