--- # vars file for service _service_required_packages: default: [] Amazon-2: - procps-ng Amazon-2018: - procps Debian: - psmisc RedHat: - psmisc Suse: - psmisc service_required_packages: "{{ _service_required_packages[ansible_distribution ~ '-' ~ ansible_distribution_major_version] | default(_service_required_packages[ansible_os_family] | default(_service_required_packages['default'])) }}"