Fresh install via homebrew on osx, brew doctor reports no problems. After installing ghc and cabal-install I then tried a cabal update and it failed because of permissions issues in the ~/.cabal folder I fixed that as stated on the brew site and tried again, no joy... Last 10 lines of the build log ( /Users/seancharles/.cabal/logs/OpenGLRaw-1.4.0.0.log ): cabal: /Users/seancharles/.cabal/logs/OpenGLRaw-1.4.0.0.log: permission denied I also did a Verify and Repair from Disk Utilities just in case, that fixed some things but no this. Have I done something wrong or is there an issue with cabal because every time I do a cabal update it seems to me the problem keeps coming back?!?! This is very frustrating because I initially installed the latest Haskell Platform for OSX .pkg file and had exactly the same problems. Sometimes I despair at how hard it seems to get a working Haskell installation...I never have these problems on Linux, only OSX and I don't know why! Thanks in advance. Sean. Some information (I did notice that seancharles:staff and seancharles:admin are in existence) that may help. I have no idea about :staff and :admin, not seen that before! all of the log file: Installing library in /Users/seancharles/.cabal/lib/x86_64-osx-ghc-7.6.3/OpenGLRaw-1.4.0.0 setup-Cabal-1.16.0-x86_64-osx-ghc-7.6.3: dist/build/HSOpenGLRaw-1.4.0.0.o: permission denied ghc --version The Glorious Glasgow Haskell Compilation System, version 7.6.3 Seans-iMac:~ seancharles$ cabal --version cabal-install version 1.18.0.2 using version 1.18.1 of the Cabal library Folder permissions: drwxr-xr-x 9 seancharles staff 306 12 Oct 20:37 .cabal brew folder: drwxr-xr-x 6 seancharles admin 204 12 Oct 20:34 Cellar