diff --git a/.gitea/workflows/deploy.yml b/.gitea/workflows/deploy.yml
index d9f9f35..7ee7919 100644
--- a/.gitea/workflows/deploy.yml
+++ b/.gitea/workflows/deploy.yml
@@ -11,6 +11,8 @@ jobs:
   # ── BUILD SERVER ──────────────────────────────────────────────────────────────
   build-app:
     runs-on: docker1
+    outputs:
+      image_prefix: ${{ steps.prefix.outputs.image_prefix }}
     defaults:
       run:
         shell: sh
@@ -61,6 +63,14 @@ jobs:
       run:
         shell: sh
     steps:
+      - name: Debug environment
+        run: |
+          hostname
+          cat /etc/hostname
+          docker --version
+          docker compose version || echo "compose plugin missing here"
+          ls /usr/libexec/docker/cli-plugins/ 2>/dev/null || echo "no plugins dir"
+          mount | grep docker || true
       - name: Deploy
         run: |
           mkdir -p "/app-cache/${{ gitea.repository }}"