nixos/options.nix

   1 { pkgs, lib, config, ... }:
   2 with lib;
   3 {
   4   imports = [
   5     modules/security/systemd-creds.nix
   6   ];
   7   options = {
   8     install.substituteOnDestination =
   9       mkEnableOption "substitute-on-destination" // { default = true; };
  10   };
  11 }