[Haskell-beginners] Re: Unable to Cabal Upgrade

[aditya siram]

I'm not sure why but installing GHC 6.10.3 fixed the issue. I was able to
'cabal upgrade' after that.
-deech

On Thu, May 14, 2009 at 8:45 PM, Andy Stewart <lazycat.manatee at gmail.com>wrote:

> Hi,
>
> aditya siram <aditya.siram at gmail.com> writes:
>
> > Hi all,
> > I'm unable to cabal upgrade with the following error:
> > Resolving dependencies...
> > cabal: dependencies conflict: ghc-6.10.1 requires process ==1.0.1.1
> however
> > process-1.0.1.1 was excluded because ghc-6.10.1 requires process
> ==1.0.1.0
> >
> > I am currently running ghc 6.10.1 and process 1.0.1.1.
> It's a bug of Cabal.
> I think developers will fix this problem in the feature.
>
> Now you can do below step for fix this problem:
>
> 1-> execute command "ghc-pkg list"
> Find same package from two list, and use command "ghc-pkg unregister
> PackageName --force" remove same pacakge.
>
> 2-> execute command "ghc-pkg unregister procss-1.0.1.1 --force"
>
> I think that's okay.
>
> And don't use "cabal upgrade" command until developers fix this problem.
>
> If you want install some package, please use command "cabal install"
>
>  -- Andy
>
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