Installation fails on mount operation

[banzo]

I am trying to install the plugin manually in FreeNAS-11.2-RELEASE-U1

iocage fetch -P --name gitlab-runner dhcp=on vnet=on bpf=yes --branch 'master'

The jail and the plugin are created but not started:

Plugin: Gitlab Runner
  Official Plugin: True
  Using RELEASE: 11.2-RELEASE
  Using Branch: master
  Post-install Artifact: https://github.com/lbivens/iocage-plugin-gitlab-runner.git
  These pkgs will be installed:
    - devel/gitlab-runner
mount: /mnt/apps_pool/iocage/releases/11.2-RELEASE/root/bin: Operation not supported by device
jail: /sbin/mount -t runner/root/bin -o nullfs /mnt/apps_pool/iocage/releases/11.2-RELEASE/root/bin /mnt/apps_pool/iocage/jails/gitlab: failed

Note: There is a folder /mnt/apps_pool/iocage/jails/gitlab runner (with a space) on the host, but the above error message references the gitlab folder.