ATM, the only way is to do an additional step and remove the file manually, like: # mkdud -c /tmp/foo.tar --format tar --force ... rpm-*.rpm # mkdir /tmp/bar # tar -C /tmp/bar -xf /tmp/foo.tar # rm -r /tmp/bar/linux/suse/<XXX>/inst-sys/usr/src/packages # mkdud -c /tmp/foo.dud /tmp/bar