I just ended up trying this:
s6-setlock -t 200 -r ...
it'll fail with EBADF:
s6lockd-helper: fatal: unable to lock /tmp/lock: Bad file descriptor
s6-setlock: fatal: unable to read ack from helper: Broken pipe
as the helper doesn't include an equivalent fix to 73638ee8e3c7
bugfix: setlock -r:
--
Alex Kiernan
