Fix flake.nix for nixos

.envrc

@@ -1 +1 @@
-use flake --impure
+use flake

flake.nix

@@ -30,6 +30,13 @@
           cargo = rust;
         });
 
+        nativeBuildInputs = with pkgs; [
+          (rust.override { extensions = ["rust-src" "rust-analyzer"]; })
+          pkg-config
+          cmake
+          python312
+        ];
+
         libs = with pkgs; [ vulkan-headers vulkan-loader vulkan-validation-layers ]
           ++ pkgs.lib.optionals pkgs.stdenv.hostPlatform.isLinux (with pkgs; [ libxkbcommon wayland libGL ])
           ++ pkgs.lib.optionals pkgs.stdenv.hostPlatform.isDarwin (with pkgs; [ darwin.apple_sdk.frameworks.SystemConfiguration ]);
@@ -37,10 +44,15 @@
       {
         devShells = {
           default = pkgs.mkShell {
-            nativeBuildInputs = with pkgs; [
-              (rust.override { extensions = ["rust-src" "rust-analyzer"]; })
-              pkg-config
-            ];
+            inherit nativeBuildInputs;
+
+            buildInputs = libs;
+
+            LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath (with pkgs; [ libxkbcommon wayland libGL ]);
+          };
+
+          with_compatibility = pkgs.mkShell {
+            inherit nativeBuildInputs;
 
             buildInputs = libs ++ [
               pkgs.nixgl.auto.nixVulkanNvidia pkgs.nixgl.nixVulkanIntel