ref: bdcf2a2f5fb2ef0ccda329d0f3f8338fb5009e9c
dir: /sys/lib/dist/mkfile/
cd:V: /tmp/9front.iso
%.iso: pc/plan9.ini.cd
@{ rfork n
bind usr /n/src9/usr
bind /n/src9 /n/src9/dist/plan9front
bind pc/plan9.ini.cd /n/src9/cfg/plan9.ini
disk/mk9660 -c9j -B 386/9bootiso -p /n/src9/sys/lib/sysconfig/proto/cdproto \
-s /n/src9 -v 'Plan 9 Front' $target
}