I don't really mind so much that Cabal etc. don't support building GHCi profiling libs (it would be easy enough to do by hand), but the fact that GHCi tries to load the un-profiling GHCi libs is a bit annoying... it doesn't work too well...

naesten@hydrogen:~/hacking/haskell/ghc-hashedrepo% ./compiler/stage2/ghc-inplace_p --interactive    
GHCi, version 6.9.20080305: http://www.haskell.org/ghc/  :? for help
ghc_p-6.9.20080305: /home/naesten/hacking/haskell/ghc-hashedrepo/libraries/ghc-prim/dist/build/HSghc-prim-0.1.o: unknown symbol `traceCcszh_fast'
Loading package ghc-prim ... linking ... ghc_p-6.9.20080305: unable to load package `ghc-prim'