trouble installing ports ("No packages available in the PKG_PATH")

[Juan Miscaro]

I'm scripting a reinstall routine for my ports on 4.3.  When I come to
'make reinstall' the thing is trying to download from the $PKG_PATH
that I have set earlier in my script and, of course, does not find the
files it needs.  Removing that variable and I get "No packages
available in the PKG_PATH".

Relevant snippet:

        export SUBDIR=$(pkg_info -Pq postfix)
        cd /usr/ports
        make reinstall

Any ideas?

~juan