Syntax error upon "FOR system_time" query from derived table

MariaDB [test]> create or replace table t1 (i int) with system versioning;

Query OK, 0 rows affected (0.18 sec)

MariaDB [test]> select * from (select * from t1) drv for system_time as of now();

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'system_time as of now()' at line 1

MariaDB [test]> select * from (select * from t1) for system_time as of now() drv;

Empty set (0.00 sec)

CREATE TABLE t1 (i INT) WITH SYSTEM VERSIONING;

SELECT * FROM t1 FOR system_time ALL;

SELECT * FROM ( SELECT * FROM t1 ) t FOR system_time ALL;

# Cleanup

DROP TABLE t1;