---
- name: append to pkgs
  ansible.builtin.set_fact:
    syspkgs: "{{ syspkgs + [ 'firefox' ] }}"
  when: ansible_os_family != 'Darwin'

- name: append to caskpkgs
  ansible.builtin.set_fact:
    caskpkgs: "{{ caskpkgs + [ 'firefox' ] }}"
  when: ansible_os_family == 'Darwin'