diff --git a/.gitea/workflows/deploy.yml b/.gitea/workflows/deploy.yml
index e3275f4..19aa5bc 100644
--- a/.gitea/workflows/deploy.yml
+++ b/.gitea/workflows/deploy.yml
@@ -113,7 +113,13 @@ jobs:
           echo "$REGISTRY_PASSWORD" | docker login "$REGISTRY_URL" -u "$REGISTRY_USERNAME" --password-stdin
           for svc in backend frontend; do
             img="$REGISTRY_URL/mangalord-$svc"
-            docker build -t "$img:$IMAGE_TAG" -t "$img:latest" -t "$img:$VERSION" "./$svc"
+            # The backend bundles Debian's headless chromium for the crawler:
+            # chromiumoxide's fetcher has no arm64 build, so the Pi must use a
+            # system binary (pair with the runtime env
+            # CRAWLER_CHROMIUM_BINARY=/usr/bin/chromium-headless-shell).
+            build_args=""
+            if [ "$svc" = "backend" ]; then build_args="--build-arg INSTALL_CHROMIUM=true"; fi
+            docker build $build_args -t "$img:$IMAGE_TAG" -t "$img:latest" -t "$img:$VERSION" "./$svc"
             for tag in "$IMAGE_TAG" latest "$VERSION"; do docker push "$img:$tag"; done
           done
           docker logout "$REGISTRY_URL"