diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 4a9d66a..c279cca 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -43,6 +43,12 @@
     steps:
       - name: Checkout
         uses: actions/checkout@v3
+      - name: Install GNU Make
+        if: runner.os == 'macOS'
+        # https://formulae.brew.sh/formula/make
+        run: |-
+          brew install make
+          echo "$(brew --prefix)/opt/make/libexec/gnubin" >> ${GITHUB_PATH}
       - name: Install Poetry
         run: pipx install poetry
       - id: python