Turborepo fails when its nested two levels down. CustomerError: The 'node_modules' folder is missing the 'next' dependency.

[a3har]

Environment information

N/A

Describe the bug

A monorepo that has turborepo managing only a subsection of the monorepo fails to deploy NextJS code. If the entire repo is a turborepo then Amplify seems to have no issues with deployment.

Eg: https://github.com/vercel/turborepo/tree/main/examples/basic

The above example deploys without issues.

However when you nest the turborepo under folders like apps/product-frontend like in the example below, it fails to detect the build artifacts as expected

Eg: https://github.com/a3har/turbo-test

It throws the error below.

[ERROR]: !!! CustomerError: The 'node_modules' folder is missing the 'next' dependency. This is required at runtime to run your application. If you are using a monorepo framework, you may need to do additionalsetup to ensure the necessary runtime dependencies are included in the build output directory Read more: https://github.com/aws-amplify/amplify-hosting/blob/main/FAQ.md#using-a-monorepo-framework

Reproduction steps

Clone the public repo https://github.com/a3har/turbo-test and use the below build settings to deploy.

Env Variables:

• AMPLIFY_MONOREPO_APP_ROOT=apps/product-frontend/apps/docs
• AMPLIFY_DIFF_DEPLOY=false

version: 1
applications:
  - frontend:
      buildPath: apps/product-frontend
      phases:
        preBuild:
          commands:
            - npm ci --cache .npm --prefer-offline
        build:
          commands:
            - npx turbo build --filter=docs...
      artifacts:
        baseDirectory: apps/docs/.next
        files:
          - "**/*"
      cache:
        paths:
          - node_modules/**/*
    appRoot: apps/product-frontend/apps/docs

[Jay2113]

Hi @a3har 👋 , thanks for reaching out. I was able to reproduce this behavior and will mark it as a bug. I'll report back here with any potential workarounds.