Laravel Mix Environment Variables and Booleans

Hey everyone. Is there a way to use boolean environment variables with Laravel Mix? For example, I'm trying to set up Echo so that we can configure the security related flags based on the environments.

window.Echo = new Echo({
    encrypted: process.env.MIX_ECHO_ENCRYPTED,
    forceTLS: process.env.MIX_ECHO_FORCE_TLS,
    disableStats: true,
});

I've shortened the example for brevity. But once compiled, it ends up looking like:

window.Echo = new Echo({
    encrypted: "true",
    forceTLS: "false",
    disableStats: true,
});

Any input would be appreciated. Thanks in advance!