INFO: mock.py version 1.1.38 starting... Start: init plugins INFO: selinux enabled Finish: init plugins Start: run INFO: Start(util-linux-2.23.2-16.el7.src.rpm) Config(c7.00.03-x86_64) Start: lock buildroot Start: clean chroot Finish: clean chroot Finish: lock buildroot Start: chroot init Start: lock buildroot Mock Version: 1.1.38 INFO: Mock Version: 1.1.38 INFO: calling preinit hooks Start: device setup Finish: device setup Start: yum update Finish: yum update Finish: lock buildroot Finish: chroot init INFO: Installed packages: Start: build phase for util-linux-2.23.2-16.el7.src.rpm Start: device setup Finish: device setup Start: build setup for util-linux-2.23.2-16.el7.src.rpm ERROR: Exception(util-linux-2.23.2-16.el7.src.rpm) Config(c7.00.03-x86_64) 0 minutes 41 seconds INFO: Results and/or logs in: logs/c7.00.04/util-linux/20140617161935/2.23.2-16.el7.x86_64 INFO: Cleaning up build root ('clean_on_failure=True') Start: lock buildroot Start: clean chroot INFO: chroot (/srv/build/7/C/mock-root/c7.00.03-x86_64) unlocked and deleted Finish: clean chroot Finish: lock buildroot ERROR: Command failed: # ['/usr/bin/yum-builddep', '--installroot', '/srv/build/7/C/mock-root/c7.00.03-x86_64/root/', '/srv/build/7/C/mock-root/c7.00.03-x86_64/root///builddir/build/SRPMS/util-linux-2.23.2-16.el7.src.rpm', '--setopt=tsflags=nocontexts'] Getting requirements for util-linux-2.23.2-16.el7.src --> audit-libs-devel-2.3.3-4.el7.x86_64 --> gettext-devel-0.18.2.1-4.el7.x86_64 --> libselinux-devel-2.2.2-6.el7.x86_64 --> ncurses-devel-5.9-13.20130511.el7.x86_64 --> pam-devel-1.1.8-9.el7.x86_64 --> zlib-devel-1.2.7-13.el7.x86_64 --> popt-devel-1.13-16.el7.x86_64 --> libutempter-devel-1.1.6-4.el7.x86_64 --> systemd-devel-208-11.el7.x86_64 --> libuser-devel-0.60-5.el7.x86_64 --> libcap-ng-devel-0.7.3-5.el7.x86_64 Error: Multilib version problems found. This often means that the root cause is something else and multilib version checking is just pointing out that there is a problem. Eg.: 1. You have an upgrade for centos-release which is missing some dependency that another package requires. Yum is trying to solve this by installing an older version of centos-release of the different architecture. If you exclude the bad architecture yum will tell you what the root cause is (which package requires what). You can try redoing the upgrade with --exclude centos-release.otherarch ... this should give you an error message showing the root cause of the problem. 2. You have multiple architectures of centos-release installed, but yum can only see an upgrade for one of those arcitectures. If you don't want/need both architectures anymore then you can remove the one with the missing update and everything will work. 3. You have duplicate versions of centos-release installed already. You can use "yum check" to get yum show these errors. ...you can also use --setopt=protected_multilib=false to remove this checking, however this is almost never the correct thing to do as something else is very likely to go wrong (often causing much more problems). Protected multilib versions: centos-release-6-99.el7.centos.0.0.i686 != centos-release-7rc1-0.el7.0.x86_64 You could try using --skip-broken to work around the problem You could try running: rpm -Va --nofiles --nodigest