Add host: bennu

- Separate nixpkgs for `sombrero` from `bennu`

flake.nix

@@ -1,12 +1,32 @@
 {
-  inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-22.11";
-  };
+  description = "nixos configs";
 
-  outputs = inputs@{ self, nixpkgs }: {
-    nixosConfigurations.sombrero = nixpkgs.lib.nixosSystem {
-      system = "aarch64-linux";
-      modules = [ ./hosts/sombrero/configuration.nix ];
+  inputs = {
+    nixpkgs2305.url = "github:nixos/nixpkgs/nixos-23.05";
+    nixpkgs2211.url = "github:nixos/nixpkgs/nixos-22.11";
+    home-manager.url = "github:nix-community/home-manager/release-23.05";
+    home-manager.inputs.nixpkgs.follows = "nixpkgs2305";
+  };
+  
+  outputs = { self, nixpkgs2305, nixpkgs2211, home-manager, ... }: {
+    nixosConfigurations = {
+      bennu = nixpkgs2305.lib.nixosSystem {
+        system = "x86_64-linux";
+        modules = [ 
+          ./hosts/bennu/configuration.nix
+          home-manager.nixosModules.home-manager
+          {
+            home-manager.useGlobalPkgs = true;
+            home-manager.useUserPackages = true;
+            home-manager.users.alex = import ./hosts/bennu/home.nix;
+          }
+        ];
+      };
+
+      sombrero = nixpkgs2211.lib.nixosSystem {
+        system = "aarch64-linux";
+        modules = [ ./hosts/sombrero/configuration.nix ];
+      };
     };
   };
 }