[Haskell-cafe] Failing to install hxt

Hi guys, i have some troubles to install hxt. My first naive attempt "cabal install hxt" fails with "cabal: cannot configure hxt-8.5.0. It requires base >=4.2 && <5". I guess that's because i use ghc 6.10.4, since "base-4.2.0.0" depends on "integer-simple" which seems to only come with ghc 6.12. I then tried to install hxt-8.3.2, which seems to be the last version supporting ghc 6.10.4. If fails with: " src/Text/XML/HXT/Parser/TagSoup.hs:292:8:     Not in scope: `optLookupEntity' cabal: Error: some packages failed to install: hxt-8.3.2 failed during the building phase. The exception was: exit: ExitFailure 1 " I have no idea, what that means. What am i doing wrong? Thanks, Lenny