Your package arc-gui-clients failed to build from source in current rawhide. https://koji.fedoraproject.org/koji/taskinfo?taskID=17710173 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild
Created attachment 1251444 [details] build.log
Created attachment 1251445 [details] root.log
Created attachment 1251446 [details] state.log
No changes needed....