[arch-haskell] darcs unbuildable

[Don Stewart]

vpkaihla:
> Hey guys,
> 
> I was about to launch a build of darcs-2.5, and noticed that it cannot
> be done right now...
> 
> Configuring darcs-2.5...
> Setup.lhs: At least the following dependencies are missing:
> parsec >=2.0 && <3.1, tar ==0.3.*, text >=0.3
> 
> 
> Apparently, we only have haskell-parsec-3.1 now. Oopsie?
> 

That's certainly a mistake: Haskell Platform requires parsec ==2.1.0.1