myos/ansible/roles/hosts/handlers/main.yml

---
# file: handlers/main.yml

- name: update boot config
  environment:
    PATH: "{{ ansible_env.PATH }}:/usr/sbin:/sbin"
  with_together:
  - '{{ boot_config }}'
  - '{{ boot_config_handler_notify.results }}'
  command: "update-extlinux"
  when: item.1.changed and item.0.dest == "/etc/update-extlinux.conf"