diff --git a/.github/actions/cmake/action.yml b/.github/actions/cmake/action.yml
index ff21b4a..b5aa3b2 100644
--- a/.github/actions/cmake/action.yml
+++ b/.github/actions/cmake/action.yml
@@ -33,6 +33,10 @@ runs:
     - name: Install windows deps
       if: runner.os == 'Windows'
       run: |
+        # https://github.com/microsoft/vcpkg/issues/41199#issuecomment-2378255699
+        export SystemDrive="$SYSTEMDRIVE"
+        export SystemRoot="$SYSTEMROOT"
+        export windir="$WINDIR"
         vcpkg install doctest:x64-mingw-dynamic trompeloeil:x64-mingw-dynamic
         echo cmake_extra_args="'-DCMAKE_TOOLCHAIN_FILE=$VCPKG_INSTALLATION_ROOT/scripts/buildsystems/vcpkg.cmake' '-DMINGW=ON' '-G MinGW Makefiles'" >> "$GITHUB_ENV"
       shell: bash