Error UndefinedVar $NIXPACKS_PATH on PayloadCMS NextJS Build

[ardiansyaherwin]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

I’m working on a PayloadCMS project hosted on a Coolify instance. Without making any changes to the Nixpacks or Coolify configuration, the build process has started failing unexpectedly.

Here’s the error message I’m encountering:

48.64 > Build failed because of webpack errors
48.83  ELIFECYCLE  Command failed with exit code 1.
------
 1 warning found (use docker --debug to expand):
 - UndefinedVar: Usage of undefined variable '$NIXPACKS_PATH' (line 18)
Dockerfile:24
--------------------
  22 |     # build phase
  23 |     COPY . /app/.
  24 | >>> RUN  pnpm run build
  25 |     
  26 |     
--------------------
ERROR: failed to solve: process "/bin/bash -ol pipefail -c pnpm run build" did not complete successfully: exit code: 1
Deployment failed. Removing the new version of your application.

To reproduce

No response

Expected behavior

No response

Environment

OS: Ubuntu Server

[notflip]

I've got some issues with nixpacks as well, it seems like my nixpacks.toml is being ignored. Do you have a custom file or just the default setup?

[jaredLunde]

It appears this may be a Coolify issue: coollabsio/coolify#2653 (comment)

[ardiansyaherwin]

solved here coollabsio/coolify#4871 (comment)