---------- Mensagem encaminhada ---------- De: "Fábio Roberto Teodoro" <fr.teodoro@gmail.com> Data: 04/08/2015 11:04 Assunto: latest Haskell Platform build fails Para: <beginner@haskell.org> One way I found to get rid of the "package(s) with this id already exist" problem was by doing a "ghc-pkg --force unregister <package>"