nixos-configs/nixosModules/extra-caches.nix

{
  nix.settings = {
    substituters = [
      # keep-sorted start
      "https://cache.lix.systems"
      "https://cache.nixos.org/"
      "https://niri.cachix.org"
      "https://nix-community.cachix.org"
      "https://nixos-raspberrypi.cachix.org"
      # keep-sorted end
    ];
    trusted-public-keys = [
      # keep-sorted start
      "cache.lix.systems:aBnZUw8zA7H35Cz2RyKFVs3H4PlGTLawyY5KRbvJR8o="
      "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
      "niri.cachix.org-1:Wv0OmO7PsuocRKzfDoJ3mulSl7Z6oezYhGhR+3W2964="
      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
      "nixos-raspberrypi.cachix.org-1:4iMO9LXa8BqhU+Rpg6LQKiGa2lsNh/j2oiYLNOQ5sPI="
      # keep-sorted end
    ];
  };
}