certificate migration breaks new installs

After a13d6e7f I get this:

fatal: [gateway1]: FAILED! => { "msg": "An unhandled exception occurred while running the lookup plugin 'file'. Error was a <class 'ansible.errors.AnsibleError'>, original message: could not locate file in lookup: /home/kwadronaut/dev/leap/liliacs/credentials/common/old_client_ca.crt" }

Is the Riseup/Calyx specific code:

- name: Install client certificate generating and API endpoint CA bundle
  copy:
    content: "{{ lookup('file', '{{ credentials_dir }}/common/old_client_ca.crt') }}\n{{lookup('file', '{{ credentials_dir }}/common/api_ca.crt') }}\n{{ lookup('file', '{{ credentials_dir }}/common/client_ca.crt') }}\n"
    dest: /etc/leap/ca/leap_ca_bundle.crt
    mode: 0444
  notify:
    - "restart docker-openvpn-openvpn"