infrastructure/machines/remote-builder-01/system.nix

{ pkgs, ... }:
{
  # Auto GC and store optimizations
  nix = {
    trustedUsers = [ "root" ];
    gc = {
      automatic = true;
      dates = "weekly";
      options = "--delete-older-than 90d";
    };
    optimise.automatic = true;
    extraOptions = ''
      min-free = ${toString (100 * 1024 * 1024)}
      max-free = ${toString (1024 * 1024 * 1024)}
    '';
  };
}