Update build_wheels.yml

.github/workflows/build_wheels.yml

@@ -76,6 +76,16 @@ jobs:
         run: |
           rm -rf build dist *.egg-info class-sz/python/classy_sz.*so class-sz/python/classy_sz.*egg-info
 
+      # Set the correct CIBW_BUILD for the specific Python version
+      - name: Set CIBW_BUILD for the correct CPython version
+        run: |
+          if [ "${{ matrix.python-version }}" == "3.9" ]; then
+            export CIBW_BUILD="cp39-*"
+          elif [ "${{ matrix.python-version }}" == "3.10" ]; then
+            export CIBW_BUILD="cp310-*"
+          fi
+          echo "Using CIBW_BUILD: $CIBW_BUILD"
+
       - name: Install system dependencies (Linux)
         if: matrix.os == 'ubuntu-latest'
         run: |
@@ -96,6 +106,7 @@ jobs:
         env:
           CIBW_ENVIRONMENT: "LDFLAGS='-L/usr/lib/x86_64-linux-gnu' CFLAGS='-I/usr/include' LIBRARY_PATH='/usr/lib/x86_64-linux-gnu:$LIBRARY_PATH' C_INCLUDE_PATH='/usr/include:$C_INCLUDE_PATH' LD_LIBRARY_PATH='/usr/lib/x86_64-linux-gnu:$LD_LIBRARY_PATH'"
           #CIBW_BUILD: "cp39-manylinux_x86_64"  # Constrain build to cp39-manylinux_x86_64
+          CIBW_BUILD: $CIBW_BUILD
           CIBW_SKIP: "cp27-* cp34-* cp35-* cp36-* cp37-* cp38-* pp* *-manylinux_i686 *musllinux*"
           CIBW_BEFORE_BUILD: |
             # Build GSL from source
@@ -195,6 +206,7 @@ jobs:
         if: matrix.os == 'macos-latest'
         env:
           # CIBW_BUILD: "cp39-macosx_arm64"  # Restrict to cp39-macosx_arm64
+          CIBW_BUILD: $CIBW_BUILD
           CIBW_ARCHS: "arm64"
           CIBW_SKIP: "cp27-* cp34-* cp35-* cp36-* cp37-* cp38-* pp*"
           LDFLAGS: "-L/opt/homebrew/opt/libomp/lib -L/opt/homebrew/opt/gsl/lib -L/opt/homebrew/opt/fftw/lib"