feat: Add nix overrides to make bindgen work

(cherry picked from commit 7caeec86a016fc7427d71ac3713adb2293c2e1ce)

rust/nci.nix

@@ -1,6 +1,33 @@
 {
-  perSystem = { pkgs, config, ... }: {
+  perSystem = { lib, config, pkgs, ... }: {
     # https://flake.parts/options/nix-cargo-integration
-    nci.projects.nix-bindings.path = ./.;
+    nci.projects.nix-bindings = {
+      path = ./.;
+      drvConfig = {
+        mkDerivation = {
+          buildInputs = [
+            config.packages.nix
+            # stdbool.h
+            pkgs.stdenv.cc
+          ];
+          nativeBuildInputs = [
+            pkgs.pkg-config
+          ];
+        };
+        # NOTE: duplicated in flake.nix devShell
+        env = {
+          LIBCLANG_PATH =
+            if pkgs.stdenv.cc.isClang then
+              null # don't set the variable
+            else
+              lib.makeLibraryPath [ pkgs.buildPackages.llvmPackages.clang-unwrapped ];
+          BINDGEN_EXTRA_CLANG_ARGS =
+            if pkgs.stdenv.cc.isClang then
+              null # don't set the variable
+            else
+              "-I${lib.getDev pkgs.stdenv.cc.cc}/lib/gcc/${pkgs.stdenv.hostPlatform.config}/${pkgs.stdenv.cc.cc.version}/include";
+        };
+      };
+    };
   };
 }