# Nix package not working after rollout

**URL:** <https://community.firebasestudio.dev/t/nix-package-not-working-after-rollout/10929>\
**Category:** General\
**Created:** [April 22, 2025, 12:51am UTC](https://community.firebasestudio.dev/t/nix-package-not-working-after-rollout/10929 "2025-04-22T00:51:04Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![UB\_PRO](https://sea2.discourse-cdn.com/flex002/user_avatar/community.firebasestudio.dev/ub_pro/32/5492_2.png) [@UB\_PRO](https://community.firebasestudio.dev/u/UB_PRO)\
**Post date:** [April 22, 2025, 12:51am UTC](https://community.firebasestudio.dev/t/nix-package-not-working-after-rollout/10929/1 "2025-04-22T00:51:04Z")

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I am trying to use ffmpeg. It is working in firebase studio but it does not work after rollout.

```auto
{pkgs}: {
  # Which nixpkgs channel to use.
  channel = "stable-24.11"; # or "unstable"
  # Use https://search.nixos.org/packages to find packages
  packages = [
    pkgs.nodejs_20
    pkgs.ffmpeg
  ];

```

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<div class="post-metadata">

**Author:** ![See-M\_Records](https://sea2.discourse-cdn.com/flex002/user_avatar/community.firebasestudio.dev/see-m_records/32/6012_2.png) [@See-M\_Records](https://community.firebasestudio.dev/u/See-M_Records)\
**Post date:** [May 6, 2025, 3:34am UTC](https://community.firebasestudio.dev/t/nix-package-not-working-after-rollout/10929/2 "2025-05-06T03:34:44Z")

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Same issue. I even installed ffmpeg and created paths to it. Still, it does not work nor is an ffmpeg command found on the client side, after production.