Your package unoconv failed to build from source in current rawhide. https://koji.fedoraproject.org/koji/taskinfo?taskID=17789549 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild
Created attachment 1254092 [details] build.log
Created attachment 1254093 [details] root.log
Created attachment 1254094 [details] state.log
dtardon's unoconv-0.7-5.fc26 completed http://koji.fedoraproject.org/koji/buildinfo?buildID=856222