Stefan O'Rear
When you build a package, Cabal passess the -hide-all-packages option to GHC, which prevents the package from using any installed packages other than the ones explicitly listed in the Build-Depends: field.
For now, we just edit .cabal files when transporting code between GHC versions...
Just for information, the HaXml darcs repo has recently adopted the solution of containing two .cabal files, one for ghc-6.6.x, and the other for the split-base packages (>=ghc-6.7). The only difference is the build-depends line, which is now as follows: build-depends: base, haskell98, polyparse, pretty, fps But if you have collected the earlier release HaXml-1.13.2 from hackage, then you can omit both 'polyparse' and 'fps' dependencies. ('fps' will shortly be changing to 'bytestring' in any case...) Regards, Malcolm