TS2307: Cannot find module '$amplify/env/...

[jtweeks]

Environment information

System:
  OS: macOS 26.2
  CPU: (14) arm64 Apple M4 Pro
  Memory: 166.63 MB / 24.00 GB
  Shell: /bin/zsh
Binaries:
  Node: 20.19.4 - ~/.nvm/versions/node/v20.19.4/bin/node
  Yarn: undefined - undefined
  npm: 10.8.2 - ~/.nvm/versions/node/v20.19.4/bin/npm
  pnpm: 10.16.1 - ~/.nvm/versions/node/v20.19.4/bin/pnpm
NPM Packages:
  @aws-amplify/backend: 1.15.0
  @aws-amplify/backend-ai: Not Found
  @aws-amplify/backend-cli: 1.5.0
  @aws-amplify/backend-deployer: 1.1.20
  @aws-amplify/backend-output-schemas: 1.8.0
  @aws-amplify/backend-secret: 1.4.2
  @aws-amplify/cli-core: 1.4.1
  @aws-amplify/data-schema: 1.20.2
  @aws-amplify/form-generator: 1.2.6
  @aws-amplify/model-generator: 1.2.2
  @aws-amplify/sandbox: 1.2.12
  @aws-amplify/schema-generator: 1.4.1
  aws-amplify: 6.15.10
  aws-cdk: 2.1006.0
  aws-cdk-lib: 2.186.0
  typescript: 5.8.2
No AWS environment variables
No CDK environment variables

Describe the bug

I was updating from versions backend: 1.15.0 -> 1.19.0, backend-cli 1.5.0 -> 1.8.1, aws-cdk-lib 2.186.0 -> 2.235.1.

The backend build, doesn't have a front end attached to it. Only a web hook command, to build a separate front end project.

Sandbox builds and runs without a problem.

I have currently reverted the dependency version changes, but left my numerous updates to my backend to attempt a deployment. The info above is after reverting.

Reproduction steps

Attempt a deployment in amplify

[jtweeks]

Reverting all the dependencies, gave me a better error message and I made some code changes. The newer version of the backend did not provide as much detail. Its possible I can upgrade versions again, but I will try another day.

[pahud]

This seems to be a type generation/module resolution problem off the top of my head, but we suggest:

• When you're ready to try upgrading again, go incrementally (1.15 → 1.16 → 1.17, etc.) rather than jumping multiple versions at once
• Before deploying after an upgrade, run npx ampx generate outputs and clear out .amplify folder to ensure generated types are fresh
• If you can share the specific error message you got with the newer versions (even though you've reverted), that would help us investigate the error reporting regression you mentioned