I am trying to build this version of GHC on Mac OS X. I'm currently using GHC 6.6. The build is failing with the following error: ghci/InteractiveUI.hs:69:7: Could not find module `System.Console.Readline': Use -v to see a list of the files searched for. <> make[2]: *** [depend] Error 1 make[1]: *** [stage2] Error 2 make: *** [bootstrap2] Error 2 So it seems I need to install the Readline library. But building the Readline library is also giving me errors on my system. Just wondering if someone else has managed to build ghc-6.7.x on Mac OS X? If so, what did you need to do? Cheers, Ruben