diff --git a/modules/examples/lnl.nix b/modules/examples/lnl.nix
index 90b67796..c012cf7f 100644
--- a/modules/examples/lnl.nix
+++ b/modules/examples/lnl.nix
@@ -1,4 +1,5 @@
 { config, lib, pkgs, ... }:
+
 {
   system.defaults.NSGlobalDomain.AppleKeyboardUIMode = 3;
   system.defaults.NSGlobalDomain.ApplePressAndHoldEnabled = false;
@@ -324,6 +325,8 @@
     fi
   '';
 
+  environment.darwinConfig = "$HOME/.config/nixpkgs/darwin/configuration.nix";
+
   nix.nixPath =
     [ # Use local nixpkgs checkout instead of channels.
       "darwin-config=$HOME/.config/nixpkgs/darwin/configuration.nix"
diff --git a/modules/examples/simple.nix b/modules/examples/simple.nix
index 9f18ef1e..1efbdb24 100644
--- a/modules/examples/simple.nix
+++ b/modules/examples/simple.nix
@@ -7,6 +7,10 @@
     [ pkgs.vim
     ];
 
+  # Use a custom configuration.nix location.
+  # $ darwin-rebuild switch -I darwin-config=$HOME/.config/nixpkgs/darwin/configuration.nix
+  # environment.darwinConfig = "$HOME/.config/nixpkgs/darwin/configuration.nix";
+
   # Auto upgrade nix package and the daemon service.
   # services.nix-daemon.enable = true;
   # nix.package = pkgs.nix;