script.CmdUsage{
			Summary: "check that build targets are stale",
			Args:    "target...",
		},
		func(s *script.State, args ...string) (script.WaitFunc, error) {
			if len(args) == 0 {
				return nil, script.ErrUsage
			}
			tmpl := "{{if .Error}}{{.ImportPath}}: {{.Error.Err}}" +
				"{{else}}{{if not .Stale}}{{.ImportPath}} ({{.Target}}) is not stale{{end}}" +
				"{{end}}"