Add pi definition

flake.nix

@@ -81,6 +81,15 @@
           ];
           specialArgs = { inherit lib inputs; };
         };
+        pi = nixpkgs.lib.nixosSystem {
+          modules = [
+            home-manager.nixosModules.home-manager
+            agenix.nixosModules.default
+            (import ./modules)
+            ./hosts/pi
+          ];
+          specialArgs = { inherit lib inputs; };
+        };
       };
   };
 }