is it working with coffeescript?

[happy-little-one]

const config = {
  kit: {
    // hydrate the <div id="svelte"> element in src/app.html
    target: '#svelte',
  },
  preprocess: preprocess({ pug: true, coffeescript: true }),
}

routes/index.svelte

<script lang="coffee">
text = 'hello'
</script>

<template lang="pug">
h1 {text}
</template>

will get a "Cannot read properties of undefined (reading 'indexOf')" error