First you need to install the Haskell Platform: instructions for this are here:

          http://hackage.haskell.org/platform/

The code is downloadable using the cabal command, which is installed as a part of the Haskell Platform. by following these instructions in the folder where you want the code to be:

          1. Download via: cabal unpack Craft3e

          2. Go to directory: cd Craft3e-<version> e.g. cd Craft3e-0.1.0.3

          3. Install dependencies: cabal install

Doing this will make sure that not only do you get the source code, but also installs the packages that the code depends on.

The package is accessed at http://hackage.haskell.org/package/Craft3e