Hi, I want to use a preprocessor (haskell source extensions) on .xhs files in the Hoogle repo. This isn't a preprocessor that is known about by Cabal as far as I can tell, so I need to do "something". I remember that one of the main drives behind Cabal was so that additional preprocessors could be specified by the individual program. I remembered that lambdabot uses a preprocessor, but sadly that uses GHC specific preprocessor flags, and so isn't using the cabal architecture for doing this. How does Cabal do this? Any examples I can follow? Thanks Neil PS. I note that there is a new cabal-devel mailing list, but the cabal docs still suggest sending to this list for cabal questions. What should go on this list, and what should go down cabal-devel?