{
  config,
  lib,
  namespace,
  ...
}:
{
  programs.ccache = {
    enable = true;
    packageNames = [
      "ffmpeg"
      "ffmpeg-headless-rpi"
      "gjs"
      "gst-plugins-bad"
      "gtk4"
      "jemalloc"
      "libcamera-rpi"
      "libraspberrypi"
      "libsecret"
      "linux"
      "pipewire"
      "qemu"
      "raspberrypi-utils"
      "sdl"
      "sdl2"
      "uv"
      # "yubioath-flutter"
    ];
    cacheDir = "/var/cache/ccache";  # default location
  };

  # nixpkgs.overlays = [
  #   (self: super: {
  #     "yubioath-flutter" = super."yubioath-flutter".override { stdenv = super.ccacheStdenv; };
  #   })
  # ];

  nix = {
    settings = {
      extra-sandbox-paths = [ config.programs.ccache.cacheDir ];
      substituters = [
        "https://cache.mjallen.dev/nas-cache"
        "https://nixos-raspberrypi.cachix.org"
        "https://nix-community.cachix.org"
        "https://cache.nixos.org/"
      ];
      trusted-public-keys = [
        "nas-cache:Y7PR+XTLr1bLIL85PKb9Tk9/BnE5HndTKvZYWVP1/48="
        "nixos-raspberrypi.cachix.org-1:4iMO9LXa8BqhU+Rpg6LQKiGa2lsNh/j2oiYLNOQ5sPI="
        "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
      ];
      warn-dirty = lib.mkForce false;
      experimental-features = lib.mkForce [
        "nix-command"
        "flakes"
      ];
      trusted-users = [ "@wheel" ];
    };

    # Garbage collect automatically every week
    gc.automatic = lib.mkDefault true;
    gc.options = lib.mkDefault "--delete-older-than 30d";

    optimise.automatic = lib.mkDefault true;
  };

  nixpkgs = {
    config = {
      cudaSupport = lib.mkDefault config.${namespace}.hardware.nvidia.enable;
      rocmSupport = lib.mkDefault config.${namespace}.hardware.amd.enable;
      allowUnsupportedSystem = true;
    };
  };
}