[xmonad] Trouble building on Solaris

I'm trying to get xmonad compiled under Solaris 10 and I'm running into an issue with the build step. The configure step appears to go fine, but I suspect is failing silently, because when I try the build step, it tells me I need to run the configure step first (even though I already have). I've installed ghc as a user in ~/ghc-6.10.1 and I'm installing xmonad to my home folder as well. Here's the configure line I'm using: runhaskell Setup.lhs configure --user --prefix=/home/joeg/xmonad-install --extra-lib-dirs=/home/joeg/ghc-6.10.1-install/lib Also, ~/ghc-6.10.1-install/bin is in my PATH.