Your package R-systemfit failed to build from source in current rawhide. https://koji.fedoraproject.org/koji/taskinfo?taskID=17701112 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild
Created attachment 1251292 [details] build.log
Created attachment 1251293 [details] root.log
Created attachment 1251294 [details] state.log
zbyszek's R-systemfit-1.1.15-9.fc26 completed http://koji.fedoraproject.org/koji/buildinfo?buildID=840226