Update to flakes on liminal

framework/flake.nix

@@ -0,0 +1,42 @@
+{
+  description = "NixOS configuration for liminal (Framework 16)";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
+    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
+    
+    nixos-hardware.url = "github:NixOS/nixos-hardware";
+    impermanence.url = "github:nix-community/impermanence";
+    talon-nix.url = "github:nix-community/talon-nix";
+  };
+
+  outputs = { self, nixpkgs, nixpkgs-unstable, nixos-hardware, impermanence, talon-nix, ... }:
+    let
+      system = "x86_64-linux";
+      
+      # Create unstable overlay
+      overlay-unstable = final: prev: {
+        unstable = import nixpkgs-unstable {
+          inherit system;
+          config.allowUnfree = true;
+        };
+      };
+    in
+    {
+      nixosConfigurations.liminal = nixpkgs.lib.nixosSystem {
+        inherit system;
+        
+        specialArgs = {
+          inherit nixos-hardware impermanence talon-nix;
+        };
+        
+        modules = [
+          # Add unstable overlay
+          ({ config, pkgs, ... }: { nixpkgs.overlays = [ overlay-unstable ]; })
+          
+          # Import configuration
+          ./configuration.nix
+        ];
+      };
+    };
+}