hackport-0.6.4: cabal/cabal.project.travis

-- Force error messages to be better
-- Parallel new-build error messages are non-existent.
-- Turn off parallelization to get good errors.
jobs: 1

-- We vendor a copy of hackage-repo-tool so that we can
-- build it reliably.  If we eventually get new-install
-- in the bootstrap, this can go away.
optional-packages: hackage-repo-tool-*/
-- hackage-repo-tool has upper bound on Cabal
allow-newer: hackage-repo-tool:Cabal, hackage-repo-tool:time, hackage-repo-tool:directory

-- The -fno-warn-orphans is a hack to make Cabal-1.24
-- build properly (unfortunately the flags here get applied
-- to the dependencies too!)
package Cabal
  ghc-options: -Werror -fno-warn-orphans

package cabal-install
  ghc-options: -Werror