[Haskell-cafe] ghc package problem

Phyx lonetiger at gmail.com
Fri Apr 16 08:06:16 EDT 2010

(sorry for the duplication, forgot to reply to the mailing list too)

Well, I did, I've completely unregistered the package,  

Did a check and recache, both completed with no problem.

In detail what's happening is, I'm building a tool that requires Haskell-src-exts, So I upgraded to the 1.9.0 release yesterday and all went fine.

However when I try to build my tool using my cabal file, it proceeds to download all dependencies and reinstalling them,, (including Haskell-src-exts) even though They are all already installed (gathered that from the output of ghc-pkg list).

It does this everytime, so everytime It tries to build all dependencies and then the tool.
But if I try to load the file in GHCI, it also says it can't find the packages.

-----Original Message-----
From: daniel.is.fischer at web.de [mailto:daniel.is.fischer at web.de] 
Sent: Friday, April 16, 2010 13:36
To: haskell-cafe at haskell.org
Cc: Phyx
Subject: Re: [Haskell-cafe] ghc package problem

Am Freitag 16 April 2010 11:28:54 schrieb Phyx:
> Hi all,
> I'm having a rather weird problem,
> Ghc-pkg list shows a package installed but doing a ghc -make will give 
> an error saying that It can't find a module that's supposed to be in 
> the installed package.
> And cabal install always reinstall all the dependencies on every change.
> It doesn't seem to see that they're already installed.

Can we have more details, please?

As a first idea, you might try

ghc-pkg unregister offending-package
cabal install offending-package

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