More verbose diagnostic

.github/workflows/build.yml

@@ -133,11 +133,15 @@ jobs:
         with:
           name: wheels-macos-13  # download wheels produced by macos-13, the intel runner
           path: wheelhouse
-          merge-multiple: true
+
+      - name: Output downloads
+        run: |
+          ls -l wheelhouse
 
       - name: Install wheels
         run: |
-          python -m pip install "wheelhouse/pikepdf*cp38*macos*x86_64.whl"  # cp38 must match python-version
+          WHEEL=wheelhouse/pikepdf*cp38*macos*x86_64.whl
+          python -m pip install $WHEEL
           python -c "import pikepdf; print(pikepdf.__version__)"
 
   wheels_windows:

pyproject.toml

@@ -106,6 +106,12 @@ skip = [
   "*musllinux*_aarch64",    # haven't tried yet/needs Cirrus tweaks
   "cp38-musllinux*",        # too old - some dependendies don't have wheels
   "pp*-manylinux*_aarch64", # not supported by Pillow yet
+  "cp39-*",                 # speed up minimum macos test
+  "cp310-*",
+  "cp311-*",
+  "pp39-*",
+  "pp310-*",
+  "cp312-*",
 ]
 test-skip = "*_universal2:arm64"
 build-frontend = "build"