Building cabal with cabal fails?

[Neil Mitchell]

Hi,

Using GHC 6.4.2, in prepration for some cabal hacking, I decided to
download Cabal from darcs and install it.

darcs get http://darcs.haskell.org/packages/Cabal --partial
cd Cabal
runhaskell Setup configure

And I get the error:

./Distribution/Simple.hs:61:1: lexical error

Should this work? If not, what should I be doing.

Thanks

Neil