haskell-xmonad-contrib: update to version 0.11.3
haskell-Hipmunk: update to version 5.2.0.14
haskell-JuicyPixels: update to version 3.1.5.1
haskell-ghc-events: update to version 0.4.3.0
haskell-github: update to version 0.8
haskell-libmpd: update to version 0.8.0.3
haskell-logging: update to version 1.4.1
haskell-monad-extras: update to version 0.5.8
haskell-pcre-light: update to version 0.4.0.2
haskell-stringable: update to version 0.1.3
haskell-HaRe: update to version 0.7.2.3
haskell-hslogger: update to version 1.2.4
haskell-threadscope: update to version 0.2.3
haskell-attoparsec: update to version 0.11.3.0
haskell-unordered-containers: update to version 0.2.4.0
haskell-fgl: add version 5.5.0.1
haskell-text: update to version 1.1.1.1
haskell-network: update to version 2.5.0.0
haddock-2.14.2: re-generate with cabal2nix

Fixes <https://github.com/NixOS/nixpkgs/issues/2481>.
happy-1.19.3: patch code to build with ghc-head

https://github.com/simonmar/happy/issues/20