SyntaxError: src/MarkdownRenderer.test.ts: Unexpected token

[satonotdead]

I see that message when I try to npm build run:

babel src --out-dir built --extensions ".ts,.js"

SyntaxError: src/MarkdownRenderer.test.ts: Unexpected token (3:12)
  1 | import { promises as fs } from "fs";
  2 | import MarkdownRenderer from "./MarkdownRenderer";
> 3 | import type { BlockNode, InlineNode, LinkNode, ImageNode, LeafNode } from "./MarkdownRenderer";
    |             ^
  4 | 
  5 | describe("render", () => {
  6 |   it("renders a sample document", async () => {

Could be something with my environment? Can I try something for help?

Thanks.

[verlinden]

Hello, had the same issue, you have to run yarn or npm install before runnning npm build run