diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation.yml
index 34f65005..fdcb30d1 100644
--- a/.github/workflows/documentation.yml
+++ b/.github/workflows/documentation.yml
@@ -17,6 +17,11 @@ jobs:
     name: Build Simulator
     runs-on: ubuntu-latest
     steps:
+    - name: Check env vars
+      run: |
+        echo "show MO_SIM_CONFIG"
+        echo "$MO_SIM_CONFIG"
+        echo "end"
     - uses: actions/checkout@v3
     - uses: actions/setup-python@v4
       with: