linux/system/repo/saltstack/trusty.yml

parameters:
  _param:
    salt_version: 2016.3
  linux:
    system:
      repo:
        salt:
          source: "deb http://repo.saltstack.com/apt/ubuntu/14.04/amd64/${_param:salt_version} trusty main"
          key_url: "http://repo.saltstack.com/apt/ubuntu/14.04/amd64/${_param:salt_version}/SALTSTACK-GPG-KEY.pub"