servers/common/nix.nix

{ ... }:
{
  nix = {
    extraOptions = ''
      experimental-features = nix-command flakes
    '';

    gc = {
      automatic = true;
      dates = "weekly";
      options = "--delete-older-than 7d";
    };

    settings = {
      experimental-features = [
        "auto-allocate-uids"
        "flakes"
        "nix-command"
      ];

      trusted-users = [
        "root"
        "@wheel"
      ];

      substituters = [
        "https://cache.nixos.org"
        "https://cache.garnix.io"
      ];
      trusted-public-keys = [
        "cache.garnix.io:CTFPyKSLcx5RMJKfLo5EEPUObbA78b0YQ2DTCJXqr9g="
        "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
      ];
    };
  };
}