[Nix-dev] A Journey into the Haskell NG infrastructure: Part I

[cdep.illabout at gmail.com]

It would be nice to have an example of how to use shell.nix and
default.nix togehter like on Oliver Charles' wiki:

http://wiki.ocharles.org.uk/Nix

I use this for some of my personal projects and it works really well.

It'd also be nice to have an example of how to use external tools like
hlint, ghc-mod, etc.