[Haskell-cafe] Documentation bug -- building ghc from darcs sources

I've been trying to build ghc head from the darcs repo using these instructions: http://hackage.haskell.org/trac/ghc/wiki/Building/GettingTheSources Unfortunately, when I do ./darcs-all --extra get as described under "Getting more packages" it fails because the darcs-all script doesn't recognize the --extra option. Was this removed recently, and if so, how do I achieve the same effect? TIA, Mike