Hi, I am running GHC 6.12.3 at Mac OSX and have numerous problems with 'cabal install' of different packages. For example: ~>cabal install mongoDB Resolving dependencies... Configuring mongoDB-1.1.0... Preprocessing library mongoDB-1.1.0... Building mongoDB-1.1.0... ... Control/Monad/MVar.hs:16:34: Module `Control.Exception.Control' does not export `mask' cabal: Error: some packages failed to install: mongoDB-1.1.0 failed during the building phase. The exception was: ExitFailure 1 Questions about current Haskell Platform for OSX 2011.2.0.1. : (http://hackage.haskell.org/platform/mac.html) 1) Where can I find release notes to understand what version of GHC Haskell Platform for OSX 2011.2.0.1 includes? 2) Will I be able to install mongoDB-1.1.0 on this release? 3) How to install it into a separate location so it would not ruin my current platform? Thanks! Dmitri