diff -u xmonad-0.10/XMonad/Core.hs\~ xmonad-0.10/XMonad/Core.hs --- xmonad-0.10/XMonad/Core.hs~ 2011-11-19 08:14:36.000000000 +0900 +++ xmonad-0.10/XMonad/Core.hs 2011-12-02 22:54:45.903562496 +0900 @@ -456,7 +456,7 @@ -- temporarily disable SIGCHLD ignoring: uninstallSignalHandlers status <- bracket (openFile err WriteMode) hClose $ \h -> - waitForProcess =<< runProcess "ghc" ["--make", "xmonad.hs", "-i", "-ilib", "-fforce-recomp", "-v0", "-o",binn] (Just dir) + waitForProcess =<< runProcess "ghc" ["-dynamic", "-no-user-package-conf", "--make", "xmonad.hs", "-i", "-ilib", "-fforce-recomp", "-v0", "-o",binn] (Just dir) Nothing Nothing Nothing (Just h) -- re-enable SIGCHLD: