Diagnose cibuild

Author: bkoelman

.github/workflows/build.yml

@@ -131,6 +131,9 @@ jobs:
     - name: Upload coverage to codecov.io
       if: matrix.os == 'ubuntu-latest'
       uses: codecov/codecov-action@v3
+      with:
+        fail_ci_if_error: true
+        verbose: true
     - name: Generate packages
       shell: pwsh
       run: |