Opting out of UI V4 with modular player, bitmovin-player-ui, and ui:false

Version 8.245.0 uses the V4 UI. It offers a way to opt out when using the UI integration. However I’m using the bitmovin-player-ui framework with webpack and setting ui:false in player config as described in the docs. I have a custom UI so I don’t use the built-in methods (buildUI, buildModernTvUi and so on).

It’s not clear to me how I can opt out of V4 with this setup. Can anyone help?

Many thanks