I had the same problem on a Mac system, change "GHC" to "ghc" and things will work.
I didn't even think that it was an actual bug! Ticket #379 reports the problem.
On Wed, 2008-10-22 at 00:05 +0200, Henk-Jan van Tuyl wrote:Can you save a copy of the file and attach it to a new ticket at:
> L.S.,
>
> I keep getting the following warning for each "cabal install" command:
> Warning: Error parsing config file C:\Documents and
> Settings\[User]\Application Data\cabal\config: On line 1: GHC
> Warning: Using default configuration.
>
> The first line of this file is:
> compiler: GHC
>
> What can I do about this?
http://hackage.haskell.org/trac/hackage/
I'll look into why it's not parsing the old format correctly.
Once you've done that, you can delete the file and let it re-create a
default one.
Duncan
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