nixos-config/common/nix.nix

{config, ...}: {
  nix = {
    gc = {
      automatic = true;
      options = "--delete-older-than 30d";
    };
    settings = {
      auto-optimise-store = true;
      experimental-features = ["nix-command" "flakes"];
      trusted-users = [config.constants.userName];
    };
  };
  nixpkgs.config.allowUnfree = true;
}