[Haskell-cafe] How to use lib compat-base3 in ghc 6.10?

[Magicloud]

Hi,
    Xmonad needs Data.Generics from base3. And I found out that there is 
a "compat-base3" in ghc 6.10, which has Data.Generics.
    But `ghc -v` reports that base-3.0.3.0 is hidden. So I wonder how 
could I compile Xmonad with ghc 6.10?

Thanks.