diff --git a/.github/workflows/python-app.yml b/.github/workflows/python-app.yml
index c84a91b..c9790f1 100644
--- a/.github/workflows/python-app.yml
+++ b/.github/workflows/python-app.yml
@@ -226,22 +226,23 @@ jobs:
 
       - name: Build Pillow from source (Windows)
         if: runner.os == 'Windows'
-        shell: msys2 {0}
+        shell: cmd
         run: |
-          echo "=== Building Pillow from source ==="
+          echo === Building Pillow from source ===
 
-          # Set up environment variables for the build
-          export PKG_CONFIG_PATH="/mingw64/lib/pkgconfig:$PKG_CONFIG_PATH"
-          export INCLUDE="/mingw64/include:$INCLUDE"
-          export LIB="/mingw64/lib:$LIB"
+          REM Add MSYS2 to PATH so Pillow can find the libraries
+          set PATH=C:\msys64\mingw64\bin;C:\msys64\usr\bin;%PATH%
+          set PKG_CONFIG_PATH=C:\msys64\mingw64\lib\pkgconfig
+          set INCLUDE=C:\msys64\mingw64\include;%INCLUDE%
+          set LIB=C:\msys64\mingw64\lib;%LIB%
 
-          # Remove any existing Pillow installation
-          uv pip uninstall -y pillow pillow-simd || true
+          REM Remove any existing Pillow installation
+          uv pip uninstall -y pillow pillow-simd
 
-          # Install build dependencies
-          uv pip install --no-binary :all: --no-build-isolation pillow
+          REM Install Pillow from source
+          uv pip install --no-binary pillow --no-build-isolation pillow
 
-          echo "=== Pillow build completed ==="
+          echo === Pillow build completed ===
           uv pip show pillow
 
       - name: Install Dependencies