code: func Arch(key string) string {
  	var arch = strings.TrimPrefix(key, "linux")
  	switch arch {
  	case "386":
  		return "i386"
  	case "amd64":
  		return "amd64"
  	case "arm6": // GOARCH + GOARM
  		return "armel"
  	case "arm7": // GOARCH + GOARM
  		return "armhf"
  	}
  	return arch
  }
docs: // Arch converts a goarch to a linux-compatible arch
  //
  // list of all linux arches: `go tool dist list | grep linux`