"Simon Marlow"
I just discovered a problem. In GHC > 6.4, local modules take precedence over package modules. This causes a problem for the Cabal distribution, eg:
$ ghc-6.4.1 Setup.lhs --make -o setup Chasing modules from: Setup.lhs ./Distribution/Simple.hs:61:1: lexical error
ie. it picks up Distribution.Simple from the local copy rather than the installed version. The solution is simple, if a little inconvenient: the Cabal sources have to move into a subdirectory of the distribution.
It's supposed to do this; use "make setup" (which just passes -cpp to ghc) to create the setup file. It bootstraps itself, but I could move the sources into a subdirectory anyway to make it possible to build it either way. I don't have makefile targets for hugs or nhc, so that would be good. peace, isaac