Comment 5 for bug 231099

Peter: I didn't want to be presumptuous, since it was possible that this was deliberate (I know the situation with Cabal can be confusing, sometimes it's included in GHC, sometimes it's not, sometimes it's not but this leads to bugs later on, and so on).

Offhand, I don't think it's entirely redundant, as I think you're supposed to be able to upgrade Cabal separately from GHC. I still have GHC 6.8.2 from Ubuntu, but locally I have 4 or 5 Cabals of different versions - this doesn't usually cause a problem like with the Bytestring upgrades/diamond dependency problem.