diff --git a/.gitignore b/.gitignore
index 3ddffea7b9..eedd7120ec 100644
--- a/.gitignore
+++ b/.gitignore
@@ -187,4 +187,5 @@ spine-godot/build/compile_commands.json
 
 spine-flutter/ios/Classes/spine-cpp
 spine-flutter/macos/Classes/spine-cpp
-spine-flutter/src/spine-cpp
\ No newline at end of file
+spine-flutter/src/spine-cpp
+spine-godot/godot-nuget
diff --git a/spine-godot/.vscode/launch.json b/spine-godot/.vscode/launch.json
index 20f2e0b0df..f89c19e2ab 100644
--- a/spine-godot/.vscode/launch.json
+++ b/spine-godot/.vscode/launch.json
@@ -54,6 +54,31 @@
                 "program": "${workspaceFolder}/godot/bin/godot.macos.editor.dev.arm64",
             },
         },
+        {
+            "type": "cppvsdbg",
+            "request": "launch",
+            "name": "debug editor v4 c#",
+            "program": "godot/bin/godot.windows.editor.dev.x86_64.mono.exe",
+            "args": [
+                "-e",
+                "--path",
+                "example-v4",
+            ],
+            "cwd": "${workspaceFolder}",
+            "preLaunchTask": "build-v4",
+            "linux": {
+                "type": "lldb",
+                "request": "launch",
+                "name": "debug editor v4",
+                "program": "${workspaceFolder}/godot/bin/godot.linux.editor.dev.x86_64",
+            },
+            "osx": {
+                "type": "lldb",
+                "request": "launch",
+                "name": "debug editor v4",
+                "program": "${workspaceFolder}/godot/bin/godot.macos.editor.dev.arm64.mono",
+            },
+        },
         {
             "type": "cppvsdbg",
             "request": "launch",
diff --git a/spine-godot/build/build-v4.sh b/spine-godot/build/build-v4.sh
index a39230f32f..8d7e30eb46 100755
--- a/spine-godot/build/build-v4.sh
+++ b/spine-godot/build/build-v4.sh
@@ -35,46 +35,69 @@ if [ -f "../godot/custom.py" ]; then
 	dev="true"
 fi
 
+mono_module=""
+mono_extension=""
+if [ $mono = "true" ]; then
+	mono_module="module_mono_enabled=yes"
+	mono_extension=".mono"
+fi
+
+dev_extension=""
+if [ $dev = "true" ]; then
+	dev_extension=".dev"
+	target="$target dev_build=true"
+fi
+
 cpus=2
 if [ "$OSTYPE" = "msys" ]; then
+	os="windows"
 	cpus=$NUMBER_OF_PROCESSORS
+	target="vsproj=yes livepp=$LIVEPP"
+	godot_exe="godot.windows.editor$dev_extension.x86_64$mono_extension.exe"
+	godot_exe_host=$godot_exe
 elif [[ "$OSTYPE" = "darwin"* ]]; then
+	os="macos"
 	cpus=$(sysctl -n hw.logicalcpu)
+	godot_exe="godot.macos.editor$dev_extension.x86_64$mono_extension"
+	godot_exe_arm="godot.macos.editor$dev_extension.arm64$mono_extension"
+	godot_exe_host=$godot_exe
+	if [ `uname -m` == "arm64" ]; then
+		godot_exe_host=$godot_exe_arm
+	fi
 else
+	os="linux"
 	cpus=$(grep -c ^processor /proc/cpuinfo)
+	godot_exe="godot.linux.editor$dev_extension.x86_64$mono_extension"
+	godot_exe_host=$godot_exe
 fi
 
 echo "CPUS: $cpus"
 
-mono_module=""
-mono_extension=""
-if [ $mono = "true" ]; then
-	mono_module="module_mono_enabled=yes"
-	mono_extension=".mono"
-fi
-
 pushd ../godot
-if [ `uname` == 'Darwin' ] && [ $dev = "false" ]; then
+if [ "$os" = "macos" ] && [ $dev = "false" ]; then
 	scons $target $mono_module arch=x86_64 compiledb=yes custom_modules="../spine_godot" opengl3=yes --jobs=$cpus
 	scons $target $mono_module arch=arm64 compiledb=yes custom_modules="../spine_godot" opengl3=yes --jobs=$cpus
-
+	if [ $mono = "true" ]; then
+		echo "Building C# glue and assemblies."
+		"./bin/$godot_exe_host" --generate-mono-glue modules/mono/glue
+		./modules/mono/build_scripts/build_assemblies.py --godot-output-dir ./bin --push-nupkgs-local ../godot-nuget
+	fi
 	pushd bin
 	cp -r ../misc/dist/macos_tools.app .
 	mv macos_tools.app Godot.app
 	mkdir -p Godot.app/Contents/MacOS
-	lipo -create godot.macos.editor.arm64$mono_extension godot.macos.editor.x86_64$mono_extension -output Godot
+	lipo -create $godot_exe_arm $godot_exe -output Godot
 	strip -S -x Godot
 	cp Godot Godot.app/Contents/MacOS/Godot
 	chmod +x Godot.app/Contents/MacOS/Godot
 	popd
 else
-	if [ "$OSTYPE" = "msys" ]; then
-		target="vsproj=yes livepp=$LIVEPP"
-	fi
-	if [ "$dev" = "true" ]; then
-		target="$target dev_build=true"
-	fi
 	scons $target $mono_module compiledb=yes custom_modules="../spine_godot" opengl3=yes --jobs=$cpus
+	if [ $mono = "true" ]; then
+		echo "Building C# glue and assemblies."
+		"./bin/$godot_exe_host" --generate-mono-glue modules/mono/glue
+		./modules/mono/build_scripts/build_assemblies.py --godot-output-dir ./bin --push-nupkgs-local ../godot-nuget
+	fi
 	cp compile_commands.json ../build
 	if [ -f "bin/godot.linuxbsd.editor.x86_64$mono_extension" ]; then
 		strip bin/godot.linuxbsd.editor.x86_64$mono_extension
diff --git a/spine-godot/build/setup.sh b/spine-godot/build/setup.sh
index 07be7f1140..8b04c11971 100755
--- a/spine-godot/build/setup.sh
+++ b/spine-godot/build/setup.sh
@@ -42,6 +42,7 @@ if [ $dev = "true" ]; then
 	cp -r .idea godot
 	cp build/custom.py godot
 	if [ "$mono" = "true" ]; then
+		echo "" >> godot/custom.py
     	echo "module_mono_enabled=\"yes\"" >> godot/custom.py
 	fi
 	cp ../formatters/.clang-format .