why is not possible to update cabal to 1.22 ? (Ubuntu 14.04)

[Daniel Bergey]

In general, you need a version of cabal that matches the version of
GHC.

My guess is you have cabal-install-1.16 earlier on PATH than the
cabal-install that comes with Haskell Platform, and that removing it
will solve your problem.

If you answer these questions, that will help me give more specific advice:

How did you install Haskell Platform (Ubuntu 14.04 package?  PPA?
tarball?)

What is the output of the following commands:
which ghc
which cabal
ghc --version
cabal --version
echo $PATH

cheers,
bergey

On 2016-04-27 at 08:08, Juan Carlos Saenz Carrasco <jcsaenzcarrasco at gmail.com> wrote:
> Hello
>
> I have tried to update, upgrade, and finally uninstall and reinstall again haskell
> platform in order to get the latest version for cabal since the current version 1.16
> (running under Ubuntu 14.04 ) always triggers the following error message not matter
> what package I try to install:
>
> ghc: ghc no longer supports single-file style package databases (dist/
> package.conf.inplace) use 'ghc-pkg init' to create the database with the correct format.
> Failed to install XXX
> ...
> ExitFailure 1
>
> I have also tried 
>
> cabal install cabal-install-1.22.0.0 --global --force-reinstalls
>
> but again, it fails.
>
> Thanks,
>
> JC
>
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