TypeScript-only modules (i.e. Deno modules) produce errors with TypeScript-specific syntax.

[pauliesnug]

Environment

I'm using [email protected] and the latest stable version of unbuild.

Reproduction

1. Create an unbuild repository, with ESNext target and module.
2. Use pnpm dlx jsr add @std/encoding (or any other Deno module)
3. Import the library in index.ts, and try to build.
4. See Unexpected token error.

Describe the bug

When using a TypeScript module in an unbuild module, the compiler gets confused and doesn't understand the Typescript-specific syntax (e.g.type foo = ... and const bar: foo = {}).

Additional context

No response

Logs

No response