out, err := exec.Command("cp", "-a", src, dst).CombinedOutput()
	if err != nil {
		os.Stderr.Write(out)
	}
	return err
}

func copyLocalData(dstbase string) (pkgpath string, err error) {
	cwd, err := os.Getwd()
	if err != nil {
		return "", err
	}

	finalPkgpath, underGoRoot, err := subdir()
	if err != nil {
		return "", err
	}
	cwd = strings.TrimSuffix(cwd, finalPkgpath)