Running Haddock for pretty-1.1.3.1...
Running hscolour for pretty-1.1.3.1...
Preprocessing library pretty-1.1.3.1...
Preprocessing test suite 'test-pretty' for pretty-1.1.3.1...
Preprocessing library pretty-1.1.3.1...
src/Text/PrettyPrint/Annotated/HughesPJ.hs:1082:31:
parse error on input ‘-- ^ this seems wrong, but remember that it's
-- working backwards at this point’
Citing from http://hydra.cryp.to/build/618012/nixlog/2/raw: