gzip_options: should simply be "-9", but may also contain any other options you want to add when gzip is executed.

packager: Name (and optionally email address) of the person using this buildtool/buildpacket installation. By setting this option, one doesn't need to supply the packager parameter on the command line

lrpowner and lrpgroup: If you must run buildpacket as root (because fakeroot doesn't work on your plattform, for example), you can specify the username/groupname that should own the generated lrp package - so you don't have files owned by "root:root" in the packages directory

mountpoint: The mountpoint where the minix-image should be mounted (used for initrd, for example). Default is /mnt/loop