How can I overide a type from a component defintion

[fbruzzi-matawan]

Hello,
I'm trying to define a new component type from the type of VTextField component from Vuetify.
Here I want CustomTextField to be same type as VTextField except for the pros rules that I want to override.

I manage to add my new type on Rules using those two syntax but it's merging both types whereas I want to override it
type CustomTextField = typeof VTextField & DefineComponent<{ rules: NewRules }>
type CustomTextField = DefineComponent<VTextField, {}, {}, {}, {}, {}, {}, {}, {}, {rules: NewRules}>

With the code above rules while now be defined as readonly ValidationRule$1[] & NewRules whereas I want it to be NewRules

Do you have an idea about how I can handle that?