pkgtools upgrade $ROOT

Greetings! I use pkgtools to build/upgrade sfs modules for another distro (a fork of puppy linux - 50M running slackware64-current). My scripts use Quote:

ROOT=<path> upgradepkg ~/slackware/*/*.txz

The new system looks in the destination directory for system files so fails. Please forgive my ignorance, but I'm fairly new to this. My immediate solution was to retain the original upgradepkg script. But with 'slackpkg upgradeall' or slapt-get, this will break. How can I modify my build scripts to accommodate the new pkgtools upgrade? Thanks in advance.

DryFalls