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 <jcsaenzcarra...@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-188.8.131.52 --global --force-reinstalls > > but again, it fails. > > Thanks, > > JC > > _______________________________________________ > cabal-devel mailing list > firstname.lastname@example.org > http://mail.haskell.org/cgi-bin/mailman/listinfo/cabal-devel _______________________________________________ cabal-devel mailing list email@example.com http://mail.haskell.org/cgi-bin/mailman/listinfo/cabal-devel