return matches[0], nil
		}
	}
	return "", fmt.Errorf("failed to find matching developer image for iOS version %s build %s", iosVer, buildVer)
}

// startDebugBridge ensures that the idevicedebugserverproxy runs on
// port 3222.
func startDebugBridge() (func(), error) {
	errChan := make(chan error, 1)
	cmd := idevCmd(exec.Command("idevicedebugserverproxy", "3222"))
	var stderr bytes.Buffer
	cmd.Stderr = &stderr