Your package rubygem-boxgrinder-build failed to build from source in current rawhide. http://koji.fedoraproject.org/koji/taskinfo?taskID=5768670 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_20_Mass_Rebuild
http://koji.fedoraproject.org/koji/taskinfo?taskID=5846919 http://koji.fedoraproject.org/koji/taskinfo?taskID=5846937