Re: [arch-haskell] ghc: /usr/share/doc/ghc/html/libraries/hslogo-16.png exists in filesystem

I think the answer is because we're still figuring out the best way to package Haskell programs and libraries, and Haskell tools (ghc, cabal) already have their own package-like-but-not-really systems for dealing with packages, which are difficult to cooperate with. I wonder if anyone has tried NixOS and whether the situation is better there? I know on many distros (including Arch!) a lot of people give up and use the Haskell tools exclusively and avoid distro package management for Haskell stuff. But that is not a good solution in the long run, because cabal is explicitly not a package manager: it doesn't know how to remove stuff cleanly and never will, amongst other problems. On Mon, Oct 15, 2012 at 11:00 AM, Thomas Friedrich wrote:

2012/10/13 Fabio Riga :

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2012/10/13 Ramana Kumar

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I'm not sure why that error happened but it happened to me too.

The problem seems to be that those files were not part of any package, but now are in ghc.

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I removed the offending files manually and tried again, and ran into more problems (although everything installed, there were many warnings about interface files being the wrong version and being skipped). So I'm not sure what the correct way out is. Perhaps it will require some manual removals then reinstalls.

This is a problem with ghc-pkg version. For previous version of ghc I had to do:

$ pacman -Rcs ghc

then reinstall ghc and needed haskell-* packages. I think you'll want to remove the offending files before installing ghc again. I hope this solve the problem.

Fabio

Why is it that every single time there is a ghc-update, I have to remove everything and reinstall everything haskell related. Haskell is such a cool language but keeping a Haskell environment up-to-date is sometimes just a real pain.

Sorry for the rant. Thomas

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