Your package libepoxy failed to build from source in current rawhide. http://koji.fedoraproject.org/koji/taskinfo?taskID=6940252 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild
Created attachment 903618 [details] build.log
Created attachment 903619 [details] root.log
Created attachment 903620 [details] state.log
Cause is bug 1098956.
libepoxy-1.2-1.fc21 has been submitted as an update for Fedora 21. https://admin.fedoraproject.org/updates/libepoxy-1.2-1.fc21
Package libepoxy-1.2-1.fc21: * should fix your issue, * was pushed to the Fedora 21 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing libepoxy-1.2-1.fc21' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2014-12842/libepoxy-1.2-1.fc21 then log in and leave karma (feedback).
libepoxy-1.2-1.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.