[Haskell-cafe] Cabal with Alex and and Happy

Is there an example of how to build a Cabal package that has a lexer generated with Alex and a parser generated with Happy? As far as I can tell, the way to do this is to add "Other-Modules: Module.Name.Of.Parser.y Module.Name.Of.Lexer.x" to each executable/library stanza. But, when I try this, I get: Could not find module `GHC.Exts': it is a member of package base-1.0, which is hidden The generated parser code contains: #if __GLASGOW_HASKELL__ >= 503 import GHC.Exts #else import GlaExts #endif Also, I don't see any way of passing options to preprocessors using Cabal. In particular, how do you pass options to Happy? I am using GHC and Cabal from the CVS head, built about two weeks ago. Thanks, Brian