Serve command not rendering marko templates

[haikyuu]

I copy pasted the example of the home page of marko, but it didn't work.
The command I use is npx @marko/serve . or npx @marko/serve index.marko.

class {
  onCreate() {
    this.state = { count: 0 };
  }
  increment() {
    this.state.count++;
  }
}

style {
  .count {
    color: #09c;
    font-size: 3em;
  }
  .example-button {
    font-size: 1em;
    padding: 0.5em;
  }
}

<div.count>
  ${state.count}
</div>
<button.example-button on-click("increment")>
  Click me!
</button>

Also, consize syntax doesn't work: a simple template like h1 -- hello wouldn't work either.

[haikyuu]

It works fine when you install @marko/serve as an npm package and run marko-serve