[Haskell-cafe] Hint & Cabal Install weirdness.

Daniel Fischer daniel.is.fischer at web.de
Mon Mar 2 00:10:56 EST 2009

Am Montag, 2. März 2009 05:24 schrieb Joseph Fredette:
> I'm attempting to install hint, I started by doing:
> cabal install hint
> and it gives me the following error:
> cabal: dependencies conflict: ghc-6.10.1 requires process == however
> process- was excluded because ghc-6.10.1 requires process ==

That seems to be *the* most frequent problem this year.

Duncan Coutts explained the matter in 

Hopefully one of the process packages is in the user db, if both are in the 
global db, it might be necessary to reinstall ghc.

> So I decided to try installing it via darcs, expecting to either have it
> work, or boil it down to one or two dependencies that were causing the
> problem, my hunch was right, it boils down to the ghc-mtl package,
> leading to the same error as above. My question is, how can I fix this?
> Doing a ghc-pkg hide on either process package breaks Cabal and Haddock
> (among others) according to the error message, and even after that
> happens, cabal complains about needing ghc >= 6.6 (or 6.8, depending on
> which package I disable), even though I have ghc 6.10.
> Detailed system info follows, help me haskell-cafe-kenobi(s), you're
> (all) my only hope(s)!
> Sysinfo:
> Arch Linux: uname -a gives:
> Linux Erdos 2.6.28-ARCH #1 SMP PREEMPT Mon Feb 2 22:22:59 UTC 2009 i686
> Intel(R) Celeron(R) CPU 3.06GHz GenuineIntel GNU/Linux
> ghc --version gives:
> The Glorious Glasgow Haskell Compilation System, version 6.10.1
> cabal --version:
> cabal-install version 0.6.0
> using version of the Cabal library
> Thanks again,
> /Joe

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