Greetings, I have a centos 5.7 (2.6.18-274.12.1.el5) server with mock (mock-1.0.25-1.el5) installed. When initialize epel-6 chroot in centos 5.7 it failed, below are the snippet of error in the terminal output, ... ... rpmlib(PayloadIsXz) is needed by mingetty-1.08-5.el6.x86_64 rpmlib(FileDigests) is needed by popt-1.13-7.el6.i686 rpmlib(PayloadIsXz) is needed by popt-1.13-7.el6.i686 rpmlib(FileDigests) is needed by findutils-4.4.2-6.el6.x86_64 rpmlib(PayloadIsXz) is needed by findutils-4.4.2-6.el6.x86_64 (1, [u'Please report this error in https://bugzilla.redhat.com/enter_bug.cgi?product=Red%20Hat%20Enterprise%20Linux%205&component=yum' ]) DEBUG: kill orphans [jason at example ~] $ I've tried clean and reinitialize the chroot but it failed. Google for this issue and mailing list only result in failed to build rpm in C5 from C6 (which is opposite of this). Has anyone successfully initialize or build srpm in C5 mock for C6 or is there a fix for this? Thank you. /Jason