On Mon, Aug 16, 2010 at 8:27 PM, Andrew Coppin
The amusing part is, if you "sudo cabal install" so it has permission to put the installed files into place, it then uses root's configuration file instead. *sigh* Well anyway, I managed to work around that. But... Cabal *still* fails to find Alex or Happy, even though they're now in the search path.
Oh, wait. They're in *my* search path. They're not in root's search path. [...]
It sounds to me like your life would be a lot easier if you knew about cabal-install's root-cmd configuration parameter! Open your .cabal/config file and uncomment and set: root-cmd: sudo Now cabal-install will take up root permissions when and only when necessary :) I only found this out after asking #haskell about similar problems. Perhaps it should be more prominent somehow.