[Haskell-cafe] Cabal hell (8.2.1,/Haskell Package/MacOS X)

[Christopher Allen]

New version of Haskell Platform, like past ones, has proven
troublesome for users.

I'd suggest using Stack (http://haskellstack.org) with the current LTS
which uses GHC 8.0.2, which is has been stable my work.

I'm happy to help if you have any questions.

— Chris


On Thu, Oct 5, 2017 at 10:29 AM, Stuart A. Kurtz <stuart at cs.uchicago.edu> wrote:
> Dear Cafe,
>
> I've had my first extended visit into cabal hell...
>
> ghc: 8.2.1 (Haskell Platform)
> cabal: 2.0.0.2
> cabal-install: 2.0.0.0
> OS: MacOS X 10.13 (High Sierra)
>
> I have problems around trying to install some standard packages: hlint, aeson. A typical error reported by cabal is
>
> <command line>: cannot satisfy -package-id hashable-1.2.6.1-14fEJP30YhAG9w115PODz0:
>     hashable-1.2.6.1-14fEJP30YhAG9w115PODz0 is unusable due to shadowed dependencies:
>       text-1.2.2.2-EGUst8sqNAZCw1xLPcmcMH
>
> FWIW, the versions of these packages reported by ghc-pkg are
>
>     hashable-1.2.6.1
>     text-1.2.2.2
>
> Suggestions welcome...
>
> Peace,
>
> Stu
>
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-- 
Chris Allen
Currently working on http://haskellbook.com