diff --git a/.github/workflows/macos-macports-build.yml b/.github/workflows/macos-macports-build.yml
index 584c0941a7..eae8cd5535 100644
--- a/.github/workflows/macos-macports-build.yml
+++ b/.github/workflows/macos-macports-build.yml
@@ -42,6 +42,8 @@ jobs:
           key: ${{ matrix.config.os }}-ccache-${{ steps.get-current-date.outputs.date }}
           restore-keys: |
             ${{ matrix.config.os }}-ccache-
+      - name: Uninstall Homebrew
+        run: bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/uninstall.sh)"
       - name: Install MacPorts
         run: |
           curl -LO https://raw.githubusercontent.com/GiovanniBussi/macports-ci/master/macports-ci
diff --git a/.github/workflows/macos-macports-wheels-build.yml b/.github/workflows/macos-macports-wheels-build.yml
index 02cfdab044..8673b02835 100644
--- a/.github/workflows/macos-macports-wheels-build.yml
+++ b/.github/workflows/macos-macports-wheels-build.yml
@@ -58,6 +58,8 @@ jobs:
           key: macos-wheels-ccache-${{ steps.get-current-date.outputs.date }}
           restore-keys: |
             ${{ matrix.config.os }}-ccache-
+      - name: Uninstall Homebrew
+        run: bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/uninstall.sh)"
       - name: Install MacPorts
         run: |
           curl -LO https://raw.githubusercontent.com/anlambert/macports-ci/master/macports-ci