DHCPv6 server with IPv6 Dynamic PD possible?

Is it possible to setup a DHCPv6 server when PD is dynamic? I’ve tried setting this up in several ways but I can’t do it. It looks like I must declare the prefix when setting up a dhcpv6 server. From what I can tell, I can only setup SLAAC for downstream clients. The tutorial here http://soucy.org/vyos/DHCPv6-PD_on_VyOS.pdf , says “The VyOS implementation of DHCPv6-PD doesn’t support populating a dynamic configuration object with the assigned prefix”

Using latest 1.4 rolling.