I'm following the instructions on the CUFP "T5 Parallel Programming in Haskell" web page for preparing for the tutorial, where it asks that I should: 'cabal install monad-par'. I'm doing this on a Mac, Snow Leopard 10.6.8, after installing Haskell Platform. I have Xcode 3.2.4 installed. I get the following error; please let me know how I should fix it (can reply to me personally instead of the list, at 'nikhil at acm dot org'. Thanks. Nikhil $ cabal install monad-par Resolving dependencies... Configuring monad-par-0.1.0.1... Preprocessing library monad-par-0.1.0.1... Building monad-par-0.1.0.1... Control/Monad/Par/Internal.hs:4:15-71: unknown flag in {-# OPTIONS #-} pragma: -fno-warn-unused-do-bind cabal: Error: some packages failed to install: monad-par-0.1.0.1 failed during the building phase. The exception was: ExitFailure 1