[Haskell-cafe] Building regex-tdfa-1.1.1 documentation

Hello. I want to build regex-tdfa-1.1.1 haddock documentation locally, but the procedure fails: $ ./setup haddock Preprocessing library regex-tdfa-1.1.1... Running Haddock for regex-tdfa-1.1.1... Warning: The documentation for the following packages are not installed. No links will be generated to these packages: rts-1.0 Text/Regex/TDFA/Common.hs:106:25: parse error on input `-- ^ identity of Position tag to set during a transition -- | Internal use to indicate type of tag and preference for larger or smaller Positions' $ haddock --version Haddock version 2.4.2, (c) Simon Marlow 2006 Ported to use the GHC API by David Waern 2006-2008 Any clues? Romildo