listCmd.Env = append(os.Environ(), "GO111MODULE=on")

	var (
		cmdEnv  []string
		modArgs []string
	)
	if out, err := listCmd.Output(); err == nil && string(bytes.TrimSpace(out)) == "std" {
		// Force module mode to use mkwinsyscall at the same version as the x/sys
		// module vendored into the standard library.
		cmdEnv = append(os.Environ(), "GO111MODULE=on")

`)
	xexit(2)
}

// commands records the available commands.
var commands = map[string]func(){
	"banner":    cmdbanner,
	"bootstrap": cmdbootstrap,
	"clean":     cmdclean,
	"env":       cmdenv,
	"install":   cmdinstall,
	"list":      cmdlist,
	"test":      cmdtest,
	"version":   cmdversion,
}

// main takes care of OS-specific startup and dispatches to xmain.
func main() {