[Haskell-cafe] Running GranSim on GHC 6.6.1

Hello, everybody! I'd like to know how to compile with GranSim. When compiling anything I get an error about package "concurrent". In fact, it complains even something simple like $ ghc -gransim ghc-6.6.1: unknown package: concurrent This happens with GHC 6.6 from Ubuntu packages and from GHC 6.6.1 compiled from the site tarballs with "./configure --enable-gransim". Is GranSim broken? Or deprecated? Maybe on GHC from Darcs? Or do I have to do something else? I couldn't find anything recent about GranSim (and I've googled quite a lot =). Any pointers are appreciated! Thanks in advance, -- Felipe.