{
  description = "topaz flake";
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-26.05";
    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
    tranquil = {
      url = "git+https://tangled.org/char.lt/tranquil-pds?ref=char/hack";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };
  outputs =
    {
      self,
      nixpkgs,
      nixpkgs-unstable,
      tranquil,
      ...
    }@inputs:
    {
      packages.x86_64-linux = {
        city-role-bot =
          nixpkgs.legacyPackages.x86_64-linux.callPackage ./packages/city-role-bot.nix { };
        watch-party =
          nixpkgs.legacyPackages.x86_64-linux.callPackage ./packages/watch-party.nix { };
      };

      nixosConfigurations.topaz = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        specialArgs = {
          inherit tranquil;
          unstable-pkgs = nixpkgs-unstable.legacyPackages."x86_64-linux";
        };
        modules = [
          (
            { pkgs, ... }:
            {
              system.stateVersion = "23.11";
              nix.package = pkgs.lix;
              nix.settings.experimental-features = [
                "nix-command"
                "flakes"
              ];
            }
          )
          ./_generated/hardware-configuration.nix
          ./_generated/networking.nix
          ./system/base.nix
          ./system/city-role-bot.nix
          ./system/irc.nix
          ./system/mail.nix
          ./system/nginx.nix
          ./system/pocket-id.nix
          ./system/prosody.nix
          ./system/soju.nix
          ./system/web/cerulea-tombstones.nix
          ./system/web/cerulea-video.nix
          ./system/web/media-site.nix
          ./system/web/serve-esm.nix
          ./system/web/watch-party.nix

          tranquil.nixosModules.default
          ./system/web/pds.nix
        ];
      };
    };
}