From: Jakob Vidmar To: web-devel@haskell.org Date: Thu, 9 Jun 2011 08:09:53 +0200 Subject: [OSX] Cabal installation error Hi all! I have GHC 7.0.3 installed, along with the latest version of Haskell Platform. When I tried installing yesod I received the following error: Yesod/Auth.hs:233:10:     Not in scope: type constructor or class `Message' cabal: Error: some packages failed to install: yesod-0.8.2 depends on yesod-auth-0.5.0 which failed to install. yesod-auth-0.5.0 failed during the building phase. The exception was: ExitFailure 1 I tried installing yesod-auth separately, but cabal insisted on installing version 0.6 (and that installed successfully). Any suggestions?

I just uploaded a new version with stricter version bounds. Can you try "cabal update && cabal install yesod" and see if that works? Thanks, Michael