exclude the unwanted ubuntu-arm64 combination

Author: inariksit

.github/workflows/build-python-package.yml

@@ -14,7 +14,13 @@ jobs:
       fail-fast: true
       matrix:
         os: [ubuntu-latest, macos-latest]
-        macos_arch: [x86_64, arm64]  # will only be used if os=macos-latest
+        # Define macos_arch only if os is macos-latest; otherwise empty string
+        macos_arch: [""]
+        include:
+          - os: macos-latest
+            macos_arch: x86_64
+          - os: macos-latest
+            macos_arch: arm64
 
     steps:
       - uses: actions/checkout@v4
@@ -32,14 +38,14 @@ jobs:
           fi
 
       - name: Build wheels on Linux
-        if: runner.os != 'macOS'
+        if: matrix.os == 'ubuntu-latest'
         env:
           CIBW_BEFORE_BUILD: cd src/runtime/c && autoreconf -i && ./configure && make && sudo make install
           CIBW_BUILD: cp38-* cp39-* cp310-* cp311-* cp312-*
         run: cibuildwheel src/runtime/python --output-dir wheelhouse
 
       - name: Build wheels on macOS
-        if: runner.os == 'macOS'
+        if: matrix.os == 'macos-latest'
         env:
           CIBW_ARCHS_MACOS: ${{ matrix.macos_arch }}
           CIBW_BUILD: cp38-* cp39-* cp310-* cp311-* cp312-*
@@ -54,7 +60,7 @@ jobs:
 
       - uses: actions/upload-artifact@v4
         with:
-          name: wheel-${{ matrix.os }}-${{ matrix.macos_arch || 'linux' }}
+          name: wheel-${{ matrix.os }}${{ matrix.macos_arch && '-' + matrix.macos_arch || '' }}
           path: wheelhouse
 
   build_sdist: