Add Mail Template To Driver Package

Hello community,

I've made a driver that will be deployed as a package. I've built the package but my driver uses a custom mail template & I can't figure out how to include the mail template in the package.

When I try adding the mail template, I get a message saying " packages installed on the Identity Vault that can be modified..."

How do I do this? Must the mail templates be in their own package? Or must I somehow move them to be listed under the driver?