On Mon, Dec 9, 2013 at 3:49 PM, Christian Maeder <Christian.Maeder@dfki.de> wrote:

Couldn't match type `text-0.11.3.1:Data.Text.Internal.Text'
with `T.Text'
Expected type: [T.Text]
Actual type: [text-0.11.3.1:Data.Text.Internal.Text]

You typically get these errors when you try to use two versions of a package at the same time. Are you building with cabal? If so it should have warned you about that.