diff --git a/.github/workflows/unittest-macos.yml b/.github/workflows/unittest-macos.yml
index f9c2a838d6..0a9d31bd84 100644
--- a/.github/workflows/unittest-macos.yml
+++ b/.github/workflows/unittest-macos.yml
@@ -43,6 +43,8 @@ jobs:
       working-directory: build
       run: |
         ccache -z
+        python3 -m venv macosenv
+        source macosenv/bin/activate
         python3 -m pip install numpy
         python3 -m pip install pyyaml
         cmake -C ../cmake/presets/clang.cmake \