Hi, I installed haskell-happstack-helpers from AUR and I'm having some problems with the function exactdir on Happstack.Server.Helpers. The problem is that I can load normally the module, but the type of exactdir function is: GHCi, version 6.10.1: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer ... linking ... done. Loading package base ... linking ... done. Prelude> :m +Happstack.Helpers Prelude Happstack.Helpers> :t exactdir exactdir :: (Monad m) => String -> happstack-server-0.2.1:Happstack.Server.SimpleHTTP.ServerPartT m a -> happstack-server-0.2.1:Happstack.Server.SimpleHTTP.ServerPartT m a And ghc doesn't recognize when I pass a ServerPartT m a to exactdir. Prelude Happstack.Helpers Happstack.Server> simpleHTTP nullConf $ exactdir "/about" $ ok "Hello" <interactive>:1:22: Couldn't match expected type `ServerPartT IO a' against inferred type `happstack-server-0.2.1:Happstack.Server.SimpleHTTP.ServerPartT m [Char]' In the second argument of `($)', namely `exactdir "/about" $ ok "Hello"' In the expression: simpleHTTP nullConf $ exactdir "/about" $ ok "Hello" In the definition of `it': it = simpleHTTP nullConf $ exactdir "/about" $ ok "Hello" But if I copy the source of exactdir (and spsIf too) to the file where I use simpleHTTP the type checks correctly. Any ideas? Edgar