Tools: Pin Python version to 3.11 to fix desktop build on CI (#9212)

.github/workflows/build-macos-m1.yml

@@ -33,6 +33,11 @@ jobs:
           # https://yarnpkg.com/getting-started/install
           corepack enable
 
+      # See github-action-main.yml for explanation
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.11'
+
       - name: Build macOS M1 app
         env:
           APPLE_ASC_PROVIDER: ${{ secrets.APPLE_ASC_PROVIDER }}

.github/workflows/github-actions-main.yml

@@ -98,6 +98,15 @@ jobs:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
+      # macos-latest ships with Python 3.12 by default, but this removes a
+      # utility that's used by electron-builder (distutils) so we need to pin
+      # Python to an earlier version.
+      # Fixes error `ModuleNotFoundError: No module named 'distutils'`
+      # Ref: https://github.com/nodejs/node-gyp/issues/2869
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.11'
+
       - name: Run tests, build and publish Linux and macOS apps
         if: runner.os == 'Linux' || runner.os == 'macOs'
         env: