[Haskell-beginners] Question about ghc and cabal: finding packages

Daniel Fischer daniel.is.fischer at web.de
Thu Aug 19 08:14:44 EDT 2010

On Thursday 19 August 2010 13:19:26, Jonas Almström Duregård wrote:
> Try simply
> cabal configure
> in the directory where Setup.lhs (and your .cabal file) is located.
> /J

Or, to configure, build and install in one go, just `cabal install' in that 
If you want to go the runhaskell Setup.[l]hs road, however, you have to 
pass the --user flag to runhaskell Setup.[l]hs configure if you need 
packages from your user db.
Or you have to reinstall the cabal-installed packages globally (surprise: 
pass the --global flag to cabal install), perhaps set `user-install: False' 
in ~/.cabal/config if you want to have global installs by default.

> On 19 August 2010 09:12, C Gosch <ch.gosch at googlemail.com> wrote:
> > Hi everyone,
> > I have installed ghc 6.12.3 and the Haskell platform; now, when I
> > install packages from hackage using
> >    cabal install <package-name>,
> > they get installed in ~/.cabal,
> > which is fair enough.
> > However, when I call a
> >    runhaskell Setup.lhs configure
> > that used to work on a different computer with the same software
> > setup, ghc (or is it cabal?) complains that it cannot find the
> > packages I have just installed.
> > Checking again revealed that they are indeed installed, just not in
> > the ghc installation directory,
> > but under ~/.cabal.
> > How can I tell cabal and/or ghc where to look for libraries?
> >
> > Thanks, again, for any help!
> > Christian
> >

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