diff --git a/backend/osrm-arm64.Dockerfile b/backend/osrm-arm64.Dockerfile
index 5334d92..cdc4a8e 100644
--- a/backend/osrm-arm64.Dockerfile
+++ b/backend/osrm-arm64.Dockerfile
@@ -1,4 +1,4 @@
-FROM docker.io/arm64v8/debian:bookworm AS builder
+FROM docker.io/arm64v8/debian:bookworm
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
     clang make cmake git pkg-config ca-certificates \
@@ -19,27 +19,8 @@ RUN cd /osrm && mkdir build && cd build && \
     make -j$(nproc) osrm-extract osrm-partition osrm-customize osrm-routed && \
     make install
 
-# ---- runtime ----
-FROM docker.io/arm64v8/debian:bookworm-slim
-
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    libboost-filesystem1.81.0 \
-    libboost-iostreams1.81.0 \
-    libboost-regex1.81.0 \
-    libboost-date-time1.81.0 \
-    libboost-thread1.81.0 \
-    libboost-program-options1.81.0 \
-    libtbb12 liblua5.4-0 libxml2 libzip4 libbz2-1.0 \
-    && rm -rf /var/lib/apt/lists/*
-
-COPY --from=builder /usr/local/bin/osrm-extract \
-                    /usr/local/bin/osrm-partition \
-                    /usr/local/bin/osrm-customize \
-                    /usr/local/bin/osrm-routed \
-                    /usr/local/bin/
-
-# Lua profiles (car.lua, foot.lua, bicycle.lua, etc.)
-COPY --from=builder /osrm/profiles/ /opt/
+# Lua profiles land at /opt/ as expected by the scripts
+RUN cp -r /osrm/profiles/* /opt/
 
 WORKDIR /data
 EXPOSE 5000