diff --git a/unity/Assets/core/upm/Runtime/Src/Default/JsEnv.cs b/unity/Assets/core/upm/Runtime/Src/Default/JsEnv.cs
index 1f7a0ae0b6..88b20ce6ef 100644
--- a/unity/Assets/core/upm/Runtime/Src/Default/JsEnv.cs
+++ b/unity/Assets/core/upm/Runtime/Src/Default/JsEnv.cs
@@ -52,6 +52,12 @@ internal TypeManager TypeRegister
 
         internal IntPtr isolate;
 
+        public IntPtr Isolate {
+            get {
+                return isolate;
+            }
+        }
+
         internal ObjectPool objectPool;
 
         private readonly ILoader loader;
diff --git a/unity/Assets/core/upm/Runtime/Src/IL2Cpp/JsEnv.cs b/unity/Assets/core/upm/Runtime/Src/IL2Cpp/JsEnv.cs
index 5fff0cc58a..cb1d5a423a 100644
--- a/unity/Assets/core/upm/Runtime/Src/IL2Cpp/JsEnv.cs
+++ b/unity/Assets/core/upm/Runtime/Src/IL2Cpp/JsEnv.cs
@@ -52,6 +52,12 @@ public ILoader GetLoader()
             return loader;
         }
 
+        public IntPtr Isolate {
+            get {
+                return PuertsIl2cpp.NativeAPI.GetIsolate(nativeJsEnv);
+            }
+        }
+
         public JsEnv(): this(new DefaultLoader(), -1) {}
 
         public JsEnv(ILoader loader, int debugPort = -1)
diff --git a/unity/Assets/core/upm/Runtime/Src/IL2Cpp/Native/NativeAPI.cs b/unity/Assets/core/upm/Runtime/Src/IL2Cpp/Native/NativeAPI.cs
index 1e564886a5..47974d19e3 100644
--- a/unity/Assets/core/upm/Runtime/Src/IL2Cpp/Native/NativeAPI.cs
+++ b/unity/Assets/core/upm/Runtime/Src/IL2Cpp/Native/NativeAPI.cs
@@ -52,6 +52,9 @@ public class NativeAPI
         [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
         public static extern IntPtr GetPesapiEnvHolder(IntPtr jsEnv);
 
+        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
+        public static extern IntPtr GetIsolate(IntPtr jsEnv);
+
         [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
         public static extern IntPtr CreateCSharpTypeInfo(string name, IntPtr type_id, IntPtr super_type_id, IntPtr klass, bool isValueType, bool isDelegate, string delegateSignature);
 
diff --git a/unity/native_src/CMakeLists.txt b/unity/native_src/CMakeLists.txt
index 8d464b3e49..8eb8b2274f 100644
--- a/unity/native_src/CMakeLists.txt
+++ b/unity/native_src/CMakeLists.txt
@@ -64,6 +64,14 @@ set ( PUERTS_SRC
     ${PROJECT_SOURCE_DIR}/../../unreal/Puerts/Source/JsEnv/Private/V8InspectorImpl.cpp
 )
 
+if(DEFINED PUERTS_EXTRA_SRC)
+    list(APPEND PUERTS_SRC ${PUERTS_EXTRA_SRC})
+endif()
+
+if(DEFINED PUERTS_EXTRA_INC)
+    include_directories(${PUERTS_EXTRA_INC})
+endif()
+
 macro(source_group_by_dir proj_dir source_files)
     if(MSVC OR APPLE)
         get_filename_component(sgbd_cur_dir ${proj_dir} ABSOLUTE)
diff --git a/unity/native_src_il2cpp/CMakeLists.txt b/unity/native_src_il2cpp/CMakeLists.txt
index 6b50add3ad..41453555e5 100644
--- a/unity/native_src_il2cpp/CMakeLists.txt
+++ b/unity/native_src_il2cpp/CMakeLists.txt
@@ -64,6 +64,13 @@ set ( PUERTS_SRC
     ${PROJECT_SOURCE_DIR}/../../unreal/Puerts/Source/JsEnv/Private/V8InspectorImpl.cpp
 )
 
+if(DEFINED PUERTS_EXTRA_SRC)
+    list(APPEND PUERTS_SRC ${PUERTS_EXTRA_SRC})
+endif()
+
+if(DEFINED PUERTS_EXTRA_INC)
+    include_directories(${PUERTS_EXTRA_INC})
+endif()
 
 macro(source_group_by_dir proj_dir source_files)
     if(MSVC OR APPLE)
@@ -172,7 +179,18 @@ elseif ( ANDROID )
     #         "${CMAKE_BINARY_DIR}/libpuerts_il2cpp.so" -o
     #         "${CMAKE_BINARY_DIR}/libpuerts_il2cpp.stripped.so~"
     #         COMMENT "Strip debug symbols done on final binary.")
-
+    if (JS_ENGINE EQUAL "v8_9.4")
+        add_custom_command(TARGET puerts_il2cpp POST_BUILD
+            COMMAND cp ARGS ${BACKEND_LIB_NAMES} ./
+            COMMAND cp ARGS ${CMAKE_BINARY_DIR}/libpuerts_il2cpp.a ./libpuerts_il2cpp_tmp.a
+            COMMAND ${ANDROID_TOOLCHAIN_PREFIX}ar ARGS -x libpuerts_il2cpp_tmp.a
+            COMMAND ${ANDROID_TOOLCHAIN_PREFIX}ar ARGS -rs libwee8.a *.o
+            COMMAND mv ARGS libwee8.a ${CMAKE_BINARY_DIR}/libpuerts_il2cpp.a
+            COMMAND rm ARGS libpuerts_il2cpp_tmp.a
+            COMMAND rm ARGS -f *.o
+            COMMENT "combine wee8."
+        )
+    endif()
 elseif ( APPLE )
 
     if ( IOS )
diff --git a/unity/native_src_il2cpp/Src/Puerts.cpp b/unity/native_src_il2cpp/Src/Puerts.cpp
index 9849127397..53401e33d0 100644
--- a/unity/native_src_il2cpp/Src/Puerts.cpp
+++ b/unity/native_src_il2cpp/Src/Puerts.cpp
@@ -823,6 +823,11 @@ V8_EXPORT void SetLogCallback(puerts::LogCallback Log)
     puerts::GLogCallback = Log;
 }
 
+V8_EXPORT v8::Isolate* GetIsolate(puerts::JSEnv* jsEnv)
+{
+    return jsEnv->MainIsolate;
+}
+
 V8_EXPORT pesapi_env_holder GetPesapiEnvHolder(puerts::JSEnv* jsEnv)
 {
     v8::Isolate* Isolate = jsEnv->MainIsolate;
diff --git a/unity/native_src_il2cpp/cmake/backends.json b/unity/native_src_il2cpp/cmake/backends.json
index fc2ecc5271..bd508f12c8 100644
--- a/unity/native_src_il2cpp/cmake/backends.json
+++ b/unity/native_src_il2cpp/cmake/backends.json
@@ -200,6 +200,17 @@
                 "/Inc"
             ],
             "link-libraries": {
+                "android": {
+                    "armv7": [
+                        "/Lib/Android/armeabi-v7a/libwee8.a"
+                    ],
+                    "arm64": [
+                        "/Lib/Android/arm64-v8a/libwee8.a"
+                    ],
+                    "x64": [
+                        "/Lib/Android/x64/libwee8.a"
+                    ]
+                },
                 "win": {
                     "ia32": [
                         "/Lib/Win32/wee8.lib"
@@ -223,17 +234,6 @@
                 }
             },
             "copy-libraries": {
-                "android": {
-                    "armv7": [
-                        "/Lib/Android/armeabi-v7a/libwee8.a"
-                    ],
-                    "arm64": [
-                        "/Lib/Android/arm64-v8a/libwee8.a"
-                    ],
-                    "x64": [
-                        "/Lib/Android/x64/libwee8.a"
-                    ]
-                },
                 "ios": {
                     "arm64": [
                         "/Lib/iOS/arm64/libwee8.a"