diff --git a/.github/workflows/ci-cpu-windows.yml b/.github/workflows/ci-cpu-windows.yml
index 87123c8e8..539dc9f68 100644
--- a/.github/workflows/ci-cpu-windows.yml
+++ b/.github/workflows/ci-cpu-windows.yml
@@ -45,7 +45,7 @@ jobs:
     - name: Configure
       run: |
         cd build
-        cmake .. -DCMAKE_TOOLCHAIN_FILE=${VCPKG_INSTALLATION_ROOT}/scripts/buildsystems/vcpkg.cmake -DPBRT_USE_PREGENERATED_RGB_TO_SPECTRUM_TABLES=True ${{ matrix.config }}
+        cmake .. -DCMAKE_TOOLCHAIN_FILE="$env:VCPKG_INSTALLATION_ROOT"/scripts/buildsystems/vcpkg.cmake -DPBRT_USE_PREGENERATED_RGB_TO_SPECTRUM_TABLES=True ${{ matrix.config }}
       
     - name: Build
       run: cmake --build build --parallel --config Release