diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index fdae898..51cc46c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -11,39 +11,40 @@ jobs:
         include:
           - os: macos-latest
             arch: arm64
+            shell: bash
           - os: macos-latest
             arch: x86_64
+            shell: bash
           - os: ubuntu-latest
             arch: i686
+            shell: bash
           - os: ubuntu-latest
             arch: x86_64
+            shell: bash
           - os: windows-latest
             arch: AMD64
-          - os: windows-latest
-            arch: x86
+            shell: 'msys2 {0}'
+    defaults:
+      run:
+        shell: ${{ matrix.shell }}
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           python-version: 3.8
-      - name: Install nasm
-        if: matrix.os == 'windows-latest'
-        run: choco install -y nasm
-      - name: Install nmake
-        if: matrix.os == 'windows-latest'
-        run: |
-          & "C:\Program Files (x86)\Microsoft Visual Studio\Installer\vs_installer.exe" modify `
-           --installPath "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise" `
-           --add Microsoft.VisualStudio.Component.VC.Tools.x86.x64 --passive --norestart
-        shell: powershell
       - name: Install qemu
         if: matrix.os == 'ubuntu-latest'
         uses: docker/setup-qemu-action@v3
+      - uses: msys2/setup-msys2@v2
+        if: matrix.os == 'windows-latest'
+        with:
+          install: base-devel mingw-w64-x86_64-gcc mingw-w64-x86_64-gperf mingw-w64-x86_64-nasm
+          path-type: inherit
       - name: Build OpenSSL
         env:
           CIBW_ARCHS: ${{ matrix.arch }}
           CIBW_BEFORE_BUILD: python scripts/build-openssl.py /tmp/vendor
-          CIBW_BEFORE_BUILD_WINDOWS: scripts\build-openssl.bat C:\cibw\vendor
+          CIBW_BEFORE_BUILD_WINDOWS: python scripts\build-ffmpeg.py C:\cibw\vendor
           CIBW_BUILD: cp38-*
           CIBW_SKIP: '*-musllinux*'
           CIBW_TEST_COMMAND: python -c "import dummy"
diff --git a/scripts/build-openssl.bat b/scripts/build-openssl.bat
deleted file mode 100644
index 5a3355b..0000000
--- a/scripts/build-openssl.bat
+++ /dev/null
@@ -1,44 +0,0 @@
-set destdir=%1
-
-for %%d in (openssl %destdir%) do (
-    if exist %%d (
-        rmdir /s /q %%d
-    )
-)
-
-if %PYTHON_ARCH% == 64 (
-    set platform=win_amd64
-    set OPENSSL_CONFIG=VC-WIN64A
-    set VC_ARCH=x64
-) else (
-    set platform=win32
-    set OPENSSL_CONFIG=VC-WIN32
-    set VC_ARCH=x86
-)
-set outputfile=output\openssl-%platform%.tar.gz
-
-call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" %VC_ARCH%
-SET PATH=%PATH%;C:\Program Files\NASM
-
-mkdir openssl
-curl -L https://www.openssl.org/source/openssl-3.1.4.tar.gz -o openssl.tar.gz
-tar xzf openssl.tar.gz -C openssl --strip-components 1
-cd openssl
-
-perl Configure no-comp no-shared no-tests %OPENSSL_CONFIG%
-nmake
-
-mkdir %destdir%
-mkdir %destdir%\include
-mkdir %destdir%\lib
-xcopy include %destdir%\include\ /E
-copy libcrypto.lib %destdir%\lib\
-copy libssl.lib %destdir%\lib\
-cd ..
-
-if not exist output (
-    mkdir output
-)
-SET PATH=C:\Program Files\Git\usr\bin;%PATH%
-tar czvf %outputfile% -C %destdir% include lib
-dir output