diff --git a/scripts/github-msys2-build.sh b/scripts/github-msys2-build.sh
index 90874d6..feb868d 100644
--- a/scripts/github-msys2-build.sh
+++ b/scripts/github-msys2-build.sh
@@ -1,3 +1,82 @@
+#!/bin/bash
 
+set -xe
 
-scripts/build-ffmpeg.sh .
\ No newline at end of file
+export CC=gcc
+export CXX=g++
+
+export BUILD_ROOT="$( cd "$( dirname "${BASH_SOURCE[0]}" )/.." && pwd )"
+
+# build ffmpeg
+scripts/build-ffmpeg.sh .
+
+# build opus
+rm -rf opus
+git clone https://github.com/xiph/opus.git && cd opus && git checkout ad8fe90db79b7d2a135e3dfd2ed6631b0c5662ab
+mkdir build && cd build
+cmake \
+	-G Ninja \
+	-DCMAKE_BUILD_TYPE=Release \
+	-DCMAKE_INSTALL_PREFIX="$BUILD_ROOT/opus-prefix" \
+	..
+ninja
+ninja install
+
+cd $BUILD_ROOT
+
+wget https://download.firedaemon.com/FireDaemon-OpenSSL/openssl-1.1.1s.zip && 7z x openssl-1.1.*.zip
+
+wget https://www.libsdl.org/release/SDL2-devel-2.26.2-VC.zip && 7z x SDL2-devel-2.26.2-VC.zip
+
+export SDL_ROOT="$BUILD_ROOT/SDL2-2.26.2"
+
+echo "set(SDL2_INCLUDE_DIRS \"$SDL_ROOT/include\")
+set(SDL2_LIBRARIES \"$SDL_ROOT/lib/x64/SDL2.lib\")
+set(SDL2_LIBDIR \"$SDL_ROOT/lib/x64\")
+include($SDL_ROOT/cmake/sdl2-config-version.cmake)" > "$SDL_ROOT/SDL2Config.cmake"
+
+
+mkdir protoc && cd protoc
+wget https://github.com/protocolbuffers/protobuf/releases/download/v3.9.1/protoc-3.9.1-win64.zip &&
+7z x protoc-3.9.1-win64.zip
+
+cd $BUILD_ROOT
+
+export PATH="$PWD/protoc/bin:$PATH"
+
+PYTHON="python"
+"$PYTHON" -m pip install protobuf==3.19.5
+
+COPY_DLLS="$BUILD_ROOT/openssl-1.1/x64/bin/libcrypto-1_1-x64.dll $BUILD_ROOT/openssl-1.1/x64/bin/libssl-1_1-x64.dll $SDL_ROOT/lib/x64/SDL2.dll"
+
+echo "-- Configure"
+
+cmake \
+    -G Ninja \
+	-DCMAKE_C_COMPILER=gcc \
+	-DCMAKE_BUILD_TYPE=RelWithDebInfo \
+	-DCMAKE_PREFIX_PATH="$BUILD_ROOT/ffmpeg-prefix;$BUILD_ROOT/opus-prefix;$BUILD_ROOT/openssl-1.1/x64" \
+	-DPYTHON_EXECUTABLE="$PYTHON" \
+	-DCHIAKI_ENABLE_TESTS=OFF \
+	-DCHIAKI_ENABLE_PI_DECODER=OFF \
+	-DCHIAKI_USE_SYSTEM_NANOPB=OFF \
+	-DCHIAKI_ENABLE_GUI=OFF \
+	-DCHIAKI_ENABLE_GUI2=ON \
+	-DCHIAKI_ENABLE_SETSU=OFF \
+	-DCHIAKI_ENABLE_CLI=OFF \
+	-DCHIAKI_GUI_ENABLE_SDL_GAMECONTROLLER=ON \
+	..
+
+echo "-- Build"
+
+ninja
+
+cd $BUILD_ROOT
+
+echo "-- Deploy"
+
+mkdir ChiakiBorealis && cp build/gui2/chiaki.exe ChiakiBorealis
+
+cp -v $COPY_DLLS ChiakiBorealis
+
+ls -alh ChiakiBorealis