wheel-build: don't overwrite artifacts

.github/workflows/wheels.yml

@@ -58,8 +58,8 @@ jobs:
 
       - uses: actions/upload-artifact@834a144ee995460fba8ed112a2fc961b36a5ec5a # ratchet: actions/upload-artifact@v4
         with:
+          name: cibw-wheels-${{ matrix.os }}-${{ strategy.job-index }}
           path: ./wheelhouse/*.whl
-          overwrite: true
 
   build_sdist:
     name: Build source distribution
@@ -74,8 +74,24 @@ jobs:
 
       - uses: actions/upload-artifact@834a144ee995460fba8ed112a2fc961b36a5ec5a # ratchet: actions/upload-artifact@v4
         with:
+          name: cibw-sdist
           path: dist/*.tar.gz
-          overwrite: true
+
+  download_and_list_artifacts:
+    # Helps debug issues like https://github.com/jax-ml/ml_dtypes/issues/196
+    name: Download and list artifacts
+    needs: [build_sdist, build_wheels]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16 # ratchet:actions/download-artifact@v4
+        with:
+          # unpacks all CIBW artifacts into dist/
+          pattern: cibw-*
+          path: dist
+          merge-multiple: true
+
+      - name: List files
+        run: ls -l dist/
 
   upload_pypi:
     name: Release & Upload to PyPI
@@ -86,10 +102,13 @@ jobs:
     steps:
       - uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16 # ratchet:actions/download-artifact@v4
         with:
-          # unpacks default artifact into dist/
-          # if `name: artifact` is omitted, the action will create extra parent dir
-          name: artifact
+          # unpacks all CIBW artifacts into dist/
+          pattern: cibw-*
           path: dist
+          merge-multiple: true
+
+      - name: List files
+        run: ls -l dist/
 
       - uses: pypa/gh-action-pypi-publish@ec4db0b4ddc65acdf4bff5fa45ac92d78b56bdf0 # ratchet:pypa/gh-action-pypi-publish@v1.9
         with: