Hi Libraries, cabal-install tries to pull in unix-2.3.2.0 in it's install plan when installing cabal-install, but it doesn't successfully install for me under Ubuntu 9.10. Here's some cut'n'paste of what I've tried: $ cabal unpack unix-2.3.2.0 Downloading unix-2.3.2.0... Unpacking to unix-2.3.2.0/ $ cd unix-2.3.2.0/ $ cabal install <snip> Building unix-2.3.2.0... dist/build/System/Posix/Signals.hs:127:0: error: Signals.h: No such file or directory cabal: Error: some packages failed to install: unix-2.3.2.0 failed during the building phase. The exception was: ExitFailure 1 $ find . | grep Signals ./System/Posix/Signals.hsc ./System/Posix/Signals ./System/Posix/Signals/Exts.hsc unix-2.3.0.1 seems to have the same problem, and cabal-install can't form a valid install plan for unix-2.3.0.0. I have hsc2hs in my path at version 0.67, and I'm using GHC 6.12.1. Is there some step I'm missing? Thanks, Antoine