diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index 45ade5e..f47b2b5 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -15,6 +15,8 @@ jobs:
         uses: Homebrew/actions/setup-homebrew@master
       - name: Install deps
         run: brew install portaudio libsndfile bison flex
+      - run: bison --version
+      - run: flex --version
       - uses: actions/checkout@v4
         with:
           submodules: true