How to use stack on piffy
-------------------------

1. Run the commands:

        mkdir -p ~/.stack
        cp ~/funfiles/config.yaml ~/.stack

2. Edit the file ~/.stack/config.yaml
   and fill in your details (name, email, etc.)

3. Run the commands

        stack setup
        stack init
        stack install random
        stack ghci

   The last one should fire up a GHCi.
   Test that you indeed installed the random package by running:

        import System.Random

    in ghci.

4. Read the online documentation about stack and ghc.