It turns out this problem is caused by the installation of this side repository:
city-fan.org-release-1-12.rhel6.noarch
Specifically of this package:
libxml2-2.9.2-4.0.cf.rhel6.x86_64
which changes libxml2 so it depends on a new library (liblzma). New supermin (version 5) in RHEL 7.1 can deal with these kinds of changes automatically, but the version of supermin in RHEL 6 (version 3) cannot, at least not without rebuilding libguestfs. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com Fedora Windows cross-compiler. Compile Windows programs, test, and build Windows installers. Over 100 libraries supported. http://fedoraproject.org/wiki/MinGW