{ lib, pkgs, config, ... }:
with lib;
let cfg = config.eboskma.nix-common;
in
{
  options.eboskma.nix-common = {
    enable = mkEnableOption "activate nix-common";
    disable-cache = mkEnableOption "no not use binary cache";
  };

  config = mkIf cfg.enable {
    nixpkgs = {
      config.allowUnfree = true;
    };

    nix = {
      package = pkgs.nixFlakes;
      extraOptions = ''
        experimental-features = nix-command flakes ca-references
      '';

      autoOptimiseStore = true;

      gc = {
        automatic = true;
        dates = "weekly";
        options = "--delete-older-than=30d";
      };

      allowedUsers = [ "root" ];
    };
  };
}