Version Not Found

go.etcd.io/etcd v0.5.0-alpha.3.0.20141115001332-a817ca705b5a

The requested version v0.5.0-alpha.3.0.20141115001332-a817ca705b5a cannot be found for package go.etcd.io/etcd. Go to the default version (v0.4.9) instead.