{
  nix = {
    settings = {
      experimental-features = [ "nix-command" "flakes" ];
      substituters = [
        "https://binarycache.k3t.dev"
        "https://nix-community.cachix.org"
        "https://cache.nixos.org/"
      ];
      trusted-public-keys = [
        "binarycache.k3t.dev:cmIg4sWTZ729F1yEF2AYLtSbUXJGFYwM6tzYYF18qts=#"
        "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
      ];
    };
    optimise.automatic = true;
    gc = {
      automatic = true;
      dates = "daily";
      options = "--delete-older-than 2d";
    };
  };
  nixpkgs.config.allowUnfree = true;
}