So perhaps libvirt should BuildRequire qemu, too? When I ran "make check" on a system without qemu, I got lots of failures: ... QEMU XML-2-ARGV Misc ACPI ... FAILED libvir: QEMU error : Cannot find QEMU binary /usr/bin/qemu: No such file or directory QEMU XML-2-ARGV Misc No Reboot ... FAILED libvir: QEMU error : Cannot find QEMU binary /usr/bin/qemu: No such file or directory QEMU XML-2-ARGV Net User ... FAILED FAIL: qemuxml2argvtest Here's a patch: 2007-10-17 Jim Meyering <meyering(a)redhat.com&gt; * libvirt.spec.in (BuildRequires): Add "qemu". Index: libvirt.spec.in =================================================================== RCS file: /data/cvs/libvirt/libvirt.spec.in,v retrieving revision 1.65 diff -u -p -r1.65 libvirt.spec.in --- libvirt.spec.in 12 Oct 2007 19:54:15 -0000 1.65 +++ libvirt.spec.in 17 Oct 2007 10:11:33 -0000 @@ -25,6 +25,7 @@ BuildRequires: gnutls-devel BuildRequires: avahi-devel BuildRequires: dnsmasq BuildRequires: bridge-utils +BuildRequires: qemu Obsoletes: libvir ExclusiveArch: i386 x86_64 ia64