code: func runtimeArchitecture() (string, error) {
  	utsname := &unix.Utsname{}
  	if err := unix.Uname(utsname); err != nil {
  		return "", err
  	}
  	return string(utsname.Machine[:bytes.IndexByte(utsname.Machine[:], 0)]), nil
  }
docs: // runtimeArchitecture gets the name of the current architecture (x86, x86_64, …)