[Haskell-beginners] missing ghci, need to install cca

[Franco]

> What version of ghc do you have? I thought the 7.6.1 version
> of ghci for armhf did support a working ghci.

7.4.1 (I am running wheezy/sid).

7.6.1 is being tested in experimental [1], but debian experimental is quite a
nightmare for me, I plan to stay on stable as soon as wheezy is released.

[1] http://packages.debian.org/experimental/ghc