pinwheel: Add agenix

hosts/pinwheel/configuration.nix

@@ -2,7 +2,7 @@
 # your system.  Help is available in the configuration.nix(5) man page
 # and in the NixOS manual (accessible by running ‘nixos-help’).
 
-{ config, pkgs, ... }:
+{ system, config, pkgs, agenix, ... }:
 
 {
   imports =
@@ -86,7 +86,9 @@
 
   # List packages installed in system profile. To search, run:
   # $ nix search wget
-  environment.systemPackages = with pkgs; [];
+  environment.systemPackages = with pkgs; [
+    agenix.packages."${system}".default 
+  ];
   
   fonts.fonts = with pkgs; [
     noto-fonts