Hello, I have been developing new code for the "unix" package. I have run into what I think are ghc 6.8.2 anomalies but couldn't see a pattern. Possibly now I do. I have been using the 32-bit x86 ghc binary that I downloaded from http://www.haskell.org and running on Ubuntu Linux. I am pretty I can repeat now. Everything is ok until I do "sudo runhaskell Setup.hs install" which installs a new "unix" package that I just built. Of course the "intall" installs into /usr/local/lib/unix-2.3.0.0/ghc-6.8.2. The "install" seems to destroy some ghc compiler state under /usr/local ... This is of course just a theory. However, once I re-install ghc et. al. from the binary download then things are ok again. I have tried the ghc re-install at least 4 times. Hope I am not misleading anybody .. just trying to help! Kind regards, Vasili