Customise your ghci settings.

You can set up global or project specific ghci settings but creating a .ghci file which contains your chosen :set commands.

If you put this in your home directory (~/.ghci for Linux and OS X) these settings will be global.

If you add it to your project root, these will only apply to your project

Read more about it at http://www.haskell.org/ghc/docs/7.4.2/html/users_guide/ghci-dot-files.html