diff --git a/.gitea/workflows/validate-omnl-rail.yml b/.gitea/workflows/validate-omnl-rail.yml
index 715125ab..3e121b54 100644
--- a/.gitea/workflows/validate-omnl-rail.yml
+++ b/.gitea/workflows/validate-omnl-rail.yml
@@ -27,6 +27,15 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Install zip/unzip (act-runner image may lack them)
+        run: |
+          need=""
+          command -v zip   >/dev/null 2>&1 || need="$need zip"
+          command -v unzip >/dev/null 2>&1 || need="$need unzip"
+          if [ -n "$need" ]; then
+            sudo apt-get update && sudo apt-get install -y $need
+          fi
+
       - name: .gitignore and resolve_ids
         run: bash scripts/omnl/validate-rail.sh