[Haskell-beginners] Problems installing TagSoup.Parsec
daniel.is.fischer at web.de
Tue Feb 2 19:44:09 EST 2010
Am Mittwoch 03 Februar 2010 01:19:49 schrieb Mark Wong-VanHaren:
> Hi, Daniel-
> Many thanks for your help. Your instructions were very clear and
> worked perfectly.
> The only snag I encountered was a separate problem I had created for
> myself, which I'll mention here in case it may help someone else...
> I (thought I) wanted to uninstall TagSoup 0.8. (I didn't really need
> to.) Cabal doesn't provide an "uninstall" command, so I naively
> attempted to do it "manually" -- that is, to simply rm
> TagSoup-0.8-related files in my installation.
> This confused Cabal, which still "believed" (by virtue of config
> settings somewhere, presumably)
Cabal asks ghc-pkg what is installed, it doesn't keep a separate database.
> that TagSoup was still installed. So
> cabal failed to find the actual files needed and complained.
> Rather than manually rm-ing things, the proper solution (I believe --
> at least it worked for me) was to use "ghc-pkg unregister tagsoup".
First unregister the packages.
Then you can delete the files if you want to.
> Anyway, thanks again for your help, Daniel. Cheers,
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