{ ... }:
{
  config.dendritic.features.system-nix = {
    nixosModules = [
      (
        { config, pkgs, ... }:

        let
          user = config.dendritic.current.primaryUser;
        in
        {
          nixpkgs.config.allowUnfree = true;

          nix.settings = {
            experimental-features = [
              "nix-command"
              "flakes"
            ];

            auto-optimise-store = true;

            download-buffer-size = 262144000;
            trusted-users = [ user ];
            warn-dirty = false;

            accept-flake-config = true;
          };

          services.fstrim.enable = true;

          time.timeZone = "America/Toronto";
          nix.settings = {
            substituters = [
              "https://cache.gwg313.xyz/mycache?priority=5"
            ];
            trusted-public-keys = [
              "mycache:ovUjiiyQNUGjK8yZA4dPV1f8tIfCZrGIubdWvWpdvtc="
            ];
          };

          environment.systemPackages = [ pkgs.attic-client ];
        }
      )
    ];
  };
}