Problems building and using ghc-6.9

[Simon Marlow]

Daniel Fischer wrote:

> Then I tried to build zlib-0.4.0.1:
> $ runghc ./Setup.hs configure --user --prefix=$HOME
> Configuring zlib-0.4.0.1...
> Setup.hs: At least the following dependencies are missing:
>     base >=2.0&&<2.2
> ??? okay, there was something with flag bytestring-in-base, removed that, so 
> that build-depends was base < 2.0 || >= 2.2, bytestring >= 0.9, then
> $ runghc ./Setup.hs configure --user --prefix=$HOME
> Configuring zlib-0.4.0.1...
> Setup.hs: At least the following dependencies are missing:
>     base <2.0||>=2.2, bytestring >=0.9

This turns out to be something that broke when we changed the command-line 
syntax for ghc-pkg in the HEAD.  I've just posted a patch for Cabal on 
cvs-ghc at haskell.org.

Cheers,
	Simon