diff -u libvirt-0.7.0/debian/libvirt-bin.postinst libvirt-0.7.0/debian/libvirt-bin.postinst
--- libvirt-0.7.0/debian/libvirt-bin.postinst
+++ libvirt-0.7.0/debian/libvirt-bin.postinst
@@ -21,12 +21,12 @@
 case "$1" in
     configure)
     	if ! getent group libvirtd >/dev/null; then
-    		addgroup --system libvirtd
+    		addgroup --system libvirtd || true
 	fi
 
 	# Add each admin user to the libvirtd group
 	for u in $(grep "^admin:" /etc/group | sed -e "s/^.*://" -e "s/,/ /g"); do
-		adduser "$u" libvirtd >/dev/null
+		adduser "$u" libvirtd >/dev/null || true
 	done
 
 	# libvirt from 0.6.0 on is safe to restart with running vms: