diff --git a/letsencrypt/hooks/schedule_command-relation-joined b/letsencrypt/hooks/schedule_command-relation-joined
index e22f8ee6..ddbd0e40 100755
--- a/letsencrypt/hooks/schedule_command-relation-joined
+++ b/letsencrypt/hooks/schedule_command-relation-joined
@@ -25,6 +25,8 @@ fi
 ## Warning: 'docker -v' will use HOST directory even if launched from
 ##   'cron' container.
 file_put "$DST" <<EOF
+COMPOSE_LAUNCHER_OPTS=$COMPOSE_LAUNCHER_OPTS
+
 $schedule     root  lock $label -D -p 10 -c "\
     compose crt $SERVICE_NAME renew" 2>&1 | ts '\%F \%T \%Z' >> $LOCAL_LOG