[Bug]: Laravel docs example broken since v4.1.0 — `NIXPACKS_PHP_ROOT_DIR` is stripped from runtime, nginx serves `/app` → 404

[mpoweredo]

Description and Error Message

The official Laravel guide (https://coolify.io/docs/applications/laravel) ships a nixpacks.toml whose nginx.template.conf sets the document root from an env var:

$if(NIXPACKS_PHP_ROOT_DIR) (
    root ${NIXPACKS_PHP_ROOT_DIR};
) else (
    root /app;
)

The template is rendered at container start by prestart.mjs, which reads process.env. The docs tell you to set NIXPACKS_PHP_ROOT_DIR=/app/public in the dashboard.

Since PR #9117 (merged 2026-05-11, released in v4.1.0), Coolify filters every NIXPACKS_/RAILPACK_-prefixed variable out of the runtime environment via scopeWithoutBuildpackControlVariables on EnvironmentVariable. So NIXPACKS_PHP_ROOT_DIR is present at build time but empty in the running container.

Result: the $if sees an empty string (falsy), nginx falls back to root /app, and every route returns 404 while /public/index.php returns 200. The docs example and the current runtime behavior contradict each other.

Actual

• GET /up → 404 (from nginx, not Laravel)
• GET /public/index.php → 200
• Inside the container: grep root /etc/nginx.conf → root /app;, and env | grep NIXPACKS_PHP → both variables are empty.

Expected Behavior

GET / → Laravel responds (nginx root is /app/public).

Steps to Reproduce

1. Fresh Laravel app, no package.json (pure API).
2. New Coolify application, Build Pack = Nixpacks, Port 80.
3. Add nixpacks.toml exactly as in the Laravel docs.
4. In the dashboard set NIXPACKS_PHP_ROOT_DIR=/app/public and NIXPACKS_PHP_FALLBACK_PATH=/index.php, both marked "available during build" and "available in the container".
5. Deploy.

Example Repository URL

No response

Coolify Version

v4.3.17

Are you using Coolify Cloud?

No (self-hosted)

Operating System and Version (self-hosted)

ubuntu 22.04

Screenshots / Visuals

Additional Information

No response