src: index.ts ```ts import { T } from './model'; export function a(b: T) {} ``` model.ts ```ts export type T = { a: string; } ``` package.json ```json { "name": "my-lib", "version": "1.0.0", "types": "types/index.d.ts", "scripts": { "build": "microbundle" }, "devDependencies": { "microbundle": "^0.13.3" } } ``` after building, `./types` directory has only one file, `model.d.ts` is missing 