How to force Custom Tabs to launch as Desktop site everytime?

Question

I'm trying to implement custom tabs into my app

https://developer.chrome.com/docs/android/custom-tabs/integration-guide/

I've successfully launched the website using

@OnClick(R.id.btn_launch)
void onLaunchBtnClick(){
      String url = "https://paul.kinlan.me/";
      CustomTabsIntent.Builder builder = new CustomTabsIntent.Builder();
      CustomTabsIntent customTabsIntent = builder.build();
      customTabsIntent.launchUrl(this, Uri.parse(url));
}

However it's launching as a mobile site everytime. How can I force it to launch as a desktop site without having the user clicking checkbox?