Hi All. If you have ghc 7.0.4 on Mac OS X 10.7.3 and you have recently installed the new Xcode 4.3, here a workaround to continue using ghc without the /Developer folder (removed with Xcode 4.3). Workaround: from terminal type: sudo emacs /Library/Frameworks/GHC.framework/Versions/7.0.4-x86_64/usr/bin/ghc-7.0.4 then insert your psw. in emacs change the line pgmgcc="/Developer/usr/bin/gcc" in pgmgcc="gcc" save all. Now Your ghc should be working properly. Bye. Luca.