diff --git a/flake.nix b/flake.nix
index e041736..9989c4c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -145,6 +145,8 @@
               ]
               ++ deps;
 
+            INCLUDE_DIR = "${llvmPackages_18.libcxx.dev}/include/c++/v1";
+
             name = "C++";
           };
         }
diff --git a/src/util/types.h b/src/util/types.h
index e03d326..3bad7d4 100644
--- a/src/util/types.h
+++ b/src/util/types.h
@@ -124,4 +124,3 @@ using isize = std::ptrdiff_t;
  * @brief Represents a string.
  */
 using string = std::string;
-