[opensuse-buildservice] Branched package fails to build without any modifications

Hello everyone, I'm not sure if this is the right email list to ask questions about building packages on OBS, but I'll try anyway. I branched the "SSSD" package from the official openSUSE:13.1 repository into my home repo here: https://build.opensuse.org/package/show/home:endzone:branches:openSUSE:13.1:... The package fails to build (error during build section with "xmllint" failing) although there are no modifications! I am wondering how this can happen and why did the package build correctly in the original "openSUSE:13.1" then? See the logs here: https://build.opensuse.org/package/live_build_log/home:endzone:branches:open... Thanks, Joschi