Your package rubygem-timers failed to build from source in current rawhide.
For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild
Created attachment 906502 [details]
Created attachment 906503 [details]
Created attachment 906504 [details]
Cause is bug 1068980 (rubygem-timers >= 2.0.0 requires rubygem-hitimes).
This bug appears to have been reported against 'rawhide' during the Fedora 22 development cycle.
Changing version to '22'.
More information and reason for this action is here: