This is a nix flake that lets you import firefoxNightly via flake in a pinned, safely reproducible manner.

(put another way, this allows flakes --pure-eval + firefox-nightly, which otherwise is not so possbile)

{ pkgs, inputs, config, ... }:
{
  config = {
    environment.systemPackages = [
      inputs.firefox.packages.${pkgs.system}.firefox-nightly-bin
    ];
  };
}

1. The structures of outputs of the flake may change if/when I update to export more of the firefox-overlay ouputs. (a breaking change for users potentially)

Mozilla expects Firefox Nightly users to run with auto-update mechanisms to ensure they don't wind up stuck on an old nightly build. Using nixpkgs-mozilla already circumvents some of this philosophy by requiring you to update your system/profile frequently to get new builds.

In some (hopefully minor0) sense, this flake exacerbates that problem:

1. It requires users to update their flakes inputs (though this was already true for users that were using niv etc to pin nixpkgs-mozilla).

2. This repo adds up to an hour of lag, since the CI job runs on ~1 hour interval. Depending on when you update your inputs, and when the CI job runs, it's possible for you to "miss" a newer Nightly build that is actually available.