diff --git a/.envrc b/.envrc
index ae39e78..c4b17d7 100644
--- a/.envrc
+++ b/.envrc
@@ -1,2 +1 @@
-export NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM=1
-use_flake . --impure
+use_flake
diff --git a/flake.nix b/flake.nix
index 296203f..de0fb47 100644
--- a/flake.nix
+++ b/flake.nix
@@ -20,7 +20,7 @@
 
         stdenv =
           if pkgs.hostPlatform.isLinux
-          then pkgs.stdenvAdapters.useMoldLinker pkgs.llvmPackages_18.stdenv
+          then pkgs.stdenvAdapters.useMoldLinker pkgs.llvmPackages_18.libcxxStdenv
           else pkgs.llvmPackages_18.stdenv;
 
         sources = import ./_sources/generated.nix {
@@ -34,19 +34,17 @@
 
         fmt = mkPkg "fmt";
 
-        deps = with pkgs;
-          [
-            fmt
-            glfw
-            glm
-            vulkan-tools
-          ]
-          ++ lib.optionals stdenv.isDarwin [
-            darwin.apple_sdk.frameworks.AppKit
-            darwin.apple_sdk.frameworks.Cocoa
-            darwin.apple_sdk.frameworks.Metal
-            darwin.apple_sdk.frameworks.QuartzCore
-          ];
+        deps = with pkgs; [
+          fmt
+          glfw
+          glm
+          vulkan-extension-layer
+          vulkan-memory-allocator
+          vulkan-utility-libraries
+          vulkan-headers
+          vulkan-loader
+          vulkan-tools
+        ];
       in
         with pkgs; rec {
           packages = rec {
@@ -88,7 +86,7 @@
 
               clang-format = {
                 enable = true;
-                package = pkgs.clang-tools_18;
+                package = pkgs.llvmPackages_18.clang-tools;
               };
             };
           };
@@ -98,7 +96,7 @@
               [
                 alejandra
                 bear
-                llvmPackages_18.clang-tools
+                (llvmPackages_18.clang-tools.override {enableLibcxx = true;})
                 lldb
                 meson
                 ninja
@@ -113,13 +111,8 @@
               ]
               ++ deps;
 
-            shellHook = lib.optionals stdenv.isDarwin ''
-              export MOLTENVK_LIBRARY_PATH="${darwin.moltenvk}/lib"
-              export PATH="${llvmPackages_18.clang-tools}/bin:$PATH"
-              export VK_ICD_FILENAMES="${darwin.moltenvk}/share/vulkan/icd.d/MoltenVK_icd.json"
-              export VK_LAYER_PATH="${vulkan-validation-layers}/share/vulkan/explicit_layer.d"
-              export VULKAN_INCLUDE_DIRS="${darwin.moltenvk.dev}/include:${vulkan-headers}/include"
-              export VK_LOADER_DEBUG=all
+            shellHook = ''
+              export PATH="${llvmPackages_18.clang-tools.override {enableLibcxx = true;}}/bin:$PATH"
             '';
 
             name = "C++";
diff --git a/meson.build b/meson.build
index 56b0b91..b1dbb4c 100644
--- a/meson.build
+++ b/meson.build
@@ -5,6 +5,7 @@ project(
   default_options: [
     'cpp_std=c++20',
     'warning_level=everything',
+    'buildtype=debugoptimized'
   ],
 )
 
@@ -23,11 +24,9 @@ common_cpp_args = [
   '-Wno-unsafe-buffer-usage',
   '-Wunused-function',
   '-fvisibility=hidden',
-  '-stdlib=libc++'
 ]
 
 add_project_arguments(cpp.get_supported_arguments(common_cpp_args), language: 'cpp')
-add_project_arguments('-stdlib=libc++', language: 'cpp')
 
 source_file_names = [
   'src/main.cpp',