Toshio Kuratomi <a.badger <at> gmail.com> writes: > I don't believe so. I think we'd need to 1) rebuild all packages using the > new compression 2) Teach the deltaiso stuff that generating an F15 iso needs > to use the new version of the xz/delta*. 2) is easy enough. To get F14 to use the new compression unconditionally, I downloaded the Rawhide version of several packages and then used yum shell with the commands config gpgcheck 0 install xz-compat-libs-5.0.0-4.fc15.x86_64.rpm update xz-5.0.0-4.fc15.x86_64.rpm xz-libs-5.0.0-4.fc15.x86_64.rpm deltarpm-3.6-0.4.20100708git.fc15.x86_64.rpm deltaiso-3.6-0.4.20100708git.fc15.x86_64.rpm python-deltarpm-3.6-0.4.20100708git.fc15.x86_64.rpm run and to reverse the process (necessary so yum-presto will work), yum shell again with the commands remove xz-compat-libs downgrade xz xz-libs deltarpm deltaiso python-deltarpm run The old and new versions of deltarpm use the old and new compression unconditionally, resp. -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel