Ports upgrade within Jail

[Druckbar]

Hello List,
i have a jail hosted on a 6-2 RELEASE machine i don't have access to. As 
i don't have access, i can't upgrade the base system. But i would like 
to keep the ports i use up to date.

Will i encounter problems if i just upgrade my ports using portsnap and 
portmaster? or will those tools be aware of the version my base system 
is and only use ports that are made for this version?

-- 
Thank you
manuel