Your package ghc-hakyll failed to build from source in current rawhide. http://koji.fedoraproject.org/koji/taskinfo?taskID=6969673 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild
Created attachment 904720 [details] build.log
Created attachment 904721 [details] root.log
Created attachment 904722 [details] state.log