- name: check for archinstall in path
  command: which archinstall
  ignore_errors: true
  register: which_archinstall

- name: inspect archinstall result
  set_fact:
    archiso_detected: "{{ which_archinstall.rc == 0 }}"

- name: override the inventory_hostname
  set_fact:
    inventory_hostname: "{{ hostname }}"
  when: archiso_detected