Given the following code:

class A {}

const x = {
    constructor: A
}

const readonlyX: ReadonlyDeep<typeof x> = x;

const y = new readonlyX.constructor();

The last line gives the following error:
This expression is not constructable. Type 'ReadonlyObjectDeep<typeof A>' has no construct signatures.ts(2351)

This should probably be legitimate because using the constructor doesn't change the variable itself.