Firebase Studio / App Hosting: Build keeps failing — constant error logs no matter what I try (dev.nix + Next.js publish)

General
1

Hi Firebase Studio team/community — I’m stuck in a loop where no matter what I try, my build/publish keeps failing and I’m constantly getting error logs.

What I’m trying to do

  • Deploy a Next.js app using Firebase Studio / Firebase App Hosting

  • Goal: build + publish successfully

What’s happening

  • Builds fail repeatedly

  • I keep seeing errors similar to these (sample):

error: The option `ports` does not exist. Definition values:
- In `/home/user/studio/.idx/dev.nix': [ ]

warning: $HOME ('/home/user') is not owned by you, falling back to /root
… while evaluating derivation 'idx-gc-root'

What I already tried

  • Rebuilding the environment

  • Editing .idx/dev.nix (but I’m not sure what Firebase Studio supports vs normal Nix)

  • Re-running the build/publish after changes

Questions

  1. What is the correct way to expose ports / configure networking in Firebase Studio?
    (It looks like ports isn’t a valid option, but I don’t know what the replacement is.)

  2. Why would Firebase Studio show “$HOME not owned by you” and fall back to /root — is that normal?

  3. Is there a recommended “known-good” minimal dev.nix for a Next.js App Hosting project?

  4. What logs/commands should I run to pinpoint the real root cause?

Helpful info (I can provide if needed)

  • Firebase Studio URL (if relevant): [I can paste]

  • Repo structure: [I can paste]

  • My .idx/dev.nix: [I can paste]

  • Full error logs: [I can paste]

If you tell me exactly what to remove/change in dev.nix and what files to check, I’ll apply it and report back.

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