Re-generate expressions with cabal2nix.
haskell-cuda: update to version 0.6.0.1
haskell-persistent: update to version 1.3.3
haskell-statistics: update to version 0.13.2.0
haskell-websockets-snap: update to version 0.8.2.2
haskell-data-fin: jailbreak to fix build with reflection 1.5.x