---

- name: Ensure packages defined in install_packages are installed
  apt:
    name: "{{ install_packages }}"
    state: present
    update_cache: yes

- block:

  - name: Enable backports
    apt_repository:
      repo: "deb http://deb.debian.org/debian {{ ansible_distribution_release }}-backports main"
      filename: backports

  - name: Install backports packages
    apt:
      name: "{{ backports_packages }}"
      state: present
      default_release: "{{ ansible_distribution_release }}-backports"

  when: backports_packages is defined