nixos-config/modules/common/nix.nix

{config, ...}: {
  nix.settings = {
    auto-optimise-store = true;
    experimental-features = ["nix-command" "flakes"];
  };

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

  nixpkgs.config = {
    #    allowUnfree = true;
    #    allowUnsupportedSystem = true;
  };
}