preventing md5 mismatch errors from compression changes

Andre Robatino robatino at
Mon Nov 29 00:07:37 UTC 2010

Toshio Kuratomi <a.badger <at>> 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

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

The old and new versions of deltarpm use the old and new compression
unconditionally, resp.

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