diff --git a/Dockerfile b/Dockerfile
index 59c9950..76d9d3b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -27,7 +27,7 @@ ARG ARCH
 COPY --from=deploy-env /ulib/* /lib/
 COPY --from=deploy-env /bin/wget /bin/ 
 # copy backend
-ENV ARCH=$(uname -m)
+RUN export ARCH=$(uname -m)
 RUN echo "arch is $ARCH"
 COPY antos/backend/ARCH/ /
 RUN rm /etc/systemd -rf