wheezy:
  pkg_repo: deb http://apt.postgresql.org/pub/repos/apt/ wheezy-pgdg main
jessie:
  version: 9.4
  pkg_repo: deb http://apt.postgresql.org/pub/repos/apt/ jessie-pgdg main
trusty:
  version: 9.3
utopic:
  version: 9.4