Messed up with Cabal on Mac

[Harad]

OK, that worked, thank you very much!

I'm sorry if that wasn't the correct place for the question, I came
here as said at Cabal homepage <http://www.haskell.org/cabal/>.

On Sun, May 8, 2011 at 7:28 PM, Daniel Fischer
<daniel.is.fischer at googlemail.com> wrote:
> On Sunday 08 May 2011 18:57:19, Harad wrote:
>> Hello everybody,
>>
>> I was trying to install `snap` but I was getting this error:
>>
>> <command line>: cannot satisfy -package-id
>> haskell98-1.1.0.1-6c0d823d8a0fe4966441285c9ec0b534:
>>
>> I still don't fully understand why was this happening but, reading
>> here and there, I ended up running `ghc-pkg unregister --user
>> haskell98`. Some of you may be facepalming at this point, because then
>> if I ran `ghc-pkg check` I got a really, really long list of broken
>> packages.
>
> If you didn't use --force, those packages would have been broken before,
> ghc-pkg shouldn't unregister packages if that would break others without
> the --force flag.
>
>> So I decided to throw it all away, removed the whole Haskell
>> Platform from my computer as told here <http://bit.ly/jHBzEk> (I know,
>> pretty Mac-ish solution), installed it back... but I continue getting
>> the same error when installing `snap`, and `ghc-pkg check` still
>> throws me this infinite list: http://pastebin.com/duTC4rqX .
>
> Looks like you removed your ~/.cabal, but haven't removed your user
> package-db.
>
> The best I know is to remove ~/.ghc/[version]/package.conf.d, so your ghc
> only knows about the global packages and then reinstall the user packages.
> That will take a while, but as is, your setup seems completely broken.
>
>>
>> I searched but I didn't find any posible solution. Do you have any
>> idea of how can I clean up all that mess? Thanks in advance!
>>
>> (If my English is awful is because I'm Spanish and Spanish people are
>> the worse language learners in the world, so I'm sorry for that.)
>>
>
>
> P.S.: This sort of problem should better go to haskell-cafe rather than
> libraries, I think.
>