I tried migrating some validation code I have form Zod to Zod Mini in order to reduce my project's final bundle size.

I did get a 10KB drop when doing so but the bundle size is still large with a majority of the size coming from Zod's locales.

Below is the esbuild analysis:

I am using Zod v4.2.1 with the following (among other) esbuild compiler options:

{
    bundle: true,
    format: "cjs",
    target: "es2018",
    treeShaking: true,
}

and the following tsconfig compiler options:

{
    "module": "nodenext",
    "target": "ES2018",
    "moduleResolution": "nodenext",
}

I'm using wildcard imports (as suggested in the documentation and other reported issues) and I even tried the following variants to no effect:

import * as zod from "zod/mini";
import * as zod from "zod/v4-mini";
import * as zod from "zod/v4/mini";

Are there any other options I should be setting or actions I should take to get the locales removed from the bundle?