Hi, I tried to install yesod as explained in "Yesod In Five Minutes". I am using Haskell Platform 2011.2.0.1 on Windows Vista but I get: c:\programs\emacs-22.2\bin>cabal install yesod cabal install yesod Resolving dependencies... Downloading attempt-0.3.1... Configuring attempt-0.3.1... Preprocessing library attempt-0.3.1... Building attempt-0.3.1... Data\Attempt.hs:54:8: Could not find module `Control.Failure': There are files missing in the `failure-0.1.0.1' package, try running 'ghc-pkg check'. Use -v to see a list of the files searched for. cabal: Error: some packages failed to install: attempt-0.3.1 failed during the building phase. The exception was: ExitFailure 1 control-monad-attempt-0.3.0 depends on attempt-0.3.1 which failed to install. yesod-0.8.2.1 depends on attempt-0.3.1 which failed to install. yesod-auth-0.4.0.2 depends on attempt-0.3.1 which failed to install. Oscar Picasso