The externalPlugins example in README does not build for production

[oMoMa]

Mnimal reproduction link

Steps to reproduce:

1. Cancel the default terminal script (it's the nuxt stackblitz instance)
2. do npm run build
3. do npm run preview

Expected: The application runs normally.
Result: runtime error. The "extend" function fails. saying t is not a function.

[kensongzhu]

Had the same issue, currently transipling the dayjs in build works on my end

export default defineNuxtConfig({
  // ... other stuff

  build:{
    transpile: [/dayjs/]
  }
})