Your package ghc-wai-extra failed to build from source in current rawhide. http://koji.fedoraproject.org/koji/taskinfo?taskID=6971299 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild
Created attachment 904805 [details] build.log
Created attachment 904806 [details] root.log
Created attachment 904807 [details] state.log