Try

Author: yoanm

.github/workflows/CI.yml

@@ -89,14 +89,32 @@ jobs:
         id: out
         with:
           matrix-step-name: php-version-and-artifact
-          matrix-key: ${{ matrix.php-version }}
           outputs: |-
+            version: ${{ matrix.php-version }}
             artifact: ${{ env.COVERAGE_ARTIFACT_NAME }}
 
   debug-output:
     name: DEBUG
     runs-on: ubuntu-latest
     needs: [ tests ]
+    outputs:
+      matrix: ${{ steps.fetch-data.outputs.result }}
+    steps:
+      - uses: cloudposse/github-action-matrix-outputs-read@v1
+        id: fetch-data
+        with:
+          matrix-step-name: php-version-and-artifact
+
+      - run: echo "${{ steps.fetch-data.outputs.result }}"
+  debug-output2:
+    name: DEBUG2
+    runs-on: ubuntu-latest
+    needs: [ debug-output ]
+    strategy:
+      fail-fast: true
+      max-parallel: 4
+      matrix:
+        include:
     steps:
       - uses: cloudposse/github-action-matrix-outputs-read@v1
         id: fetch-data