Follow a port of a specific major verion

[Mikael Bak]

Hi list,

I searched for this in the handbook, but without any hits. Google gave
me nada too.

I have a machine running FreeBSD 7.3 and Postfix 2.7.2 installed from
ports. Unfortunately when I installed Postfix I did this:

cd /usr/ports/mail/postfix
make install clean

Now when Postfix 2.8.0 is released the above path in the ports tree
points to a Postfix version I do not yet want to install. I would like
to follow Postfix 2.7.x for a while.

So my question is: How can I make the ports system act as if I had
installed Postfix like this?:

cd /usr/ports/mail/postfix27
make install clean

Is there a way to tell the ports database to "follow" and older version
of Postfix without rebuild the entire port again?

TIA,
Mikael