Your package sipsak failed to build from source in current rawhide. http://koji.fedoraproject.org/koji/taskinfo?taskID=10153609 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_23_Mass_Rebuild
Created attachment 1048336 [details] build.log
Created attachment 1048337 [details] root.log
Created attachment 1048338 [details] state.log
This bug appears to have been reported against 'rawhide' during the Fedora 23 development cycle. Changing version to '23'. (As we did not run this process for some time, it could affect also pre-Fedora 23 development cycle bugs. We are very sorry. It will help us with cleanup during Fedora 23 End Of Life. Thank you.) More information and reason for this action is here: https://fedoraproject.org/wiki/BugZappers/HouseKeeping/Fedora23
Taking. Old, c11 incompatible code base. Appending -std=gnu89 to CFLAGS helps.
f24: http://koji.fedoraproject.org/koji/taskinfo?taskID=10679797 f23: http://koji.fedoraproject.org/koji/taskinfo?taskID=10679799
sipsak-0.9.6-20.fc23 has been submitted as an update for Fedora 23. https://admin.fedoraproject.org/updates/sipsak-0.9.6-20.fc23
sipsak-0.9.6-20.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.