diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
index 2bc1facc7..59a5932ae 100644
--- a/.github/workflows/c-cpp.yml
+++ b/.github/workflows/c-cpp.yml
@@ -94,6 +94,7 @@ jobs:
       - name: CMake (windows)
         shell: msys2 {0}
         run: |
+          unset temp tmp
           cmake -B build -DCMAKE_BUILD_TYPE=${{ matrix.config.buildType }} -DCMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE=artifact -DCMAKE_LIBRARY_OUTPUT_DIRECTORY=artifact ${{ matrix.config.cmakeArgs }}
           cmake --build build --config Release --parallel 2
         if: matrix.config.os == 'windows-latest'