---
- apt: name=qemu-kvm
- apt: name=libvirt-bin
  when: distro == "jessie"
- apt:
    name: "{{ item }}"
  with_items:
    - libvirt-daemon-system
    - libvirt-clients
  when: distro == "stretch" or distro == "unstable"
- apt: name=virtinst
- apt: name=virt-manager
...