1{ pkgs, user-pkgs, unstable-pkgs, ... }:
 2{
 3  programs.firefox.enable = true;
 4  programs.firefox.package = unstable-pkgs.firefox-devedition-bin;
 5
 6  environment.systemPackages =
 7    (with pkgs; [
 8      vscode
 9      nixpkgs-fmt
10      foot
11    ])
12    ++ [
13      user-pkgs.berkeley-mono
14      unstable-pkgs.nixd
15      unstable-pkgs.nixfmt-rfc-style
16    ];
17}