Joe:~# make-jpkg /home/joe/jre
You are real root -- unfortunately, some Java distributions have
install scripts that directly manipulate /etc, and may cause some
inconsistencies on your system. Instead, you should become a
non-root user and run:

fakeroot make-jpkg /home/joe/jre

which will allow no damage to be done to your system files and
still permit the Java distribution to successfully extract.

Aborting.