Your package nodejs-ws failed to build from source in current rawhide. http://koji.fedoraproject.org/koji/taskinfo?taskID=6969772 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild
Created attachment 904726 [details] build.log
Created attachment 904727 [details] root.log
Created attachment 904728 [details] state.log
Fixed. Problem was with nodejs-nan