想在ubuntu下直接用docker源码包编译安装docker，结果编译报错：

../../../mygo/src/github.com/docker/docker/dockerversion/useragent.go:18: undefined: Version
../../../mygo/src/github.com/docker/docker/dockerversion/useragent.go:20: undefined: GitCommit

请高手指教，万分感谢！