haskell-extensible-effects: re-generate expression with cabal2nix
haskell-pipes-bytestring: re-generate expression with cabal2nix
haskell-unix-time: update to version 0.3.0
haskell-bson: update to version 0.3
haskell-hcltest: update to version 0.3.2
haskell-mongoDB: update to version 2.0
haskell-quickcheck-property-monad: update to version 0.2.2
haskell-simple-sendfile: update to version 0.2.15
haskell-unix-compat: update to version 0.4.1.3