Problem while getting swarmkit source

$ go get github.com/docker/swarmkit/

github.com/docker/swarmkit/vendor/github.com/Microsoft/go-winio

src/github.com/docker/swarmkit/vendor/github.com/Microsoft/go-winio/file.go:44: undefined: syscall.Overlapped

OS being used ubuntu 15.10

Which version of golang are you using?