aptly/server/mirror/ubuntu/xenial/maas.yml

parameters:
  _param:
    apt_mk_version: stable
  aptly:
    server:
      mirror:
        maas-xenial:
          source: http://ppa.launchpad.net/maas/stable/ubuntu
          distribution: xenial
          components: main
          architectures: amd64
          gpgkeys:
            - 684D4A1C
          publisher:
            component: maas
            distributions:
              - xenial/${_param:apt_mk_version}