Hi I was previously able to build using Builder https://ghc.haskell.org/trac/ghc/wiki/Builder on my Mac using 10.9, Xcode 6.0 and ghc 7.8.3. Currently with 10.10 and Xcode 6.1 I am getting the following error using Builder. Has anybody been able to build HEAD on Mac with Yosemite wtih Xcode 6.1 and GHC 7.8.3? make test_bindist bindisttest/"install dir"/bin/runghc bindisttest/HelloWorld > bindisttest/output <command line>: can't load .so/.DLL for: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/lib/libiconv.dylib (dlopen(/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/lib/libiconv.dylib, 9): no suitable image found. Did find: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/lib/libiconv.dylib: mach-o, but wrong filetype) make[1]: *** [test_bindist] Error 1 make: *** [test_bindist] Error 2 Thanks George