Add preInstall ot buildPythonPackage (postInstall already existed) to allow selenium to work properly again.
haskell-nat: add version 0.3
haskell-naturals: add version 0.2.0.2
haskell-xmonad-extras: update to version 0.11
haskell-active: update to version 0.1.0.3
haskell-diagrams-core: update to version 0.6.0.1
haskell-diagrams-lib: update to version 0.6.0.1
haskell-dual-tree: update to version 0.1.0.1
haskell-lens: update to version 3.7.3
haskell-monoid-extras: update to version 0.2.2.2
haskell-multiarg: update to version 0.8.0.0
haskell-warp: update to version 1.3.7
git-annex: update to version 3.20130107
haskell-type-level-natural-number: add version 1.1.1
haskell-numtype-tf: add version 0.1
haskell-dimensional-tf: add version 0.1.1
firefox: adding 18.0

I had to disable it using some nixpkgs, because they were considered
'too old'. They are simply commented in the code.
linux 3.2-3.7: enable NFS_FSCACHE and CIFS_FSCACHE

NFS_FSCACHE and CIFS_FSCACHE are required to enable the local cache support for
NFS and CIFS (the 'fsc' mount option). The reasoning for enabling it from 3.2
and forward is that at least Ubuntu 12.04 (linux 3.2) has it turned on. Could
probably be enabled for earlier kernels too.