diff --git a/Dockerfile b/Dockerfile
index 0cb1e79..59c9950 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -27,8 +27,9 @@ ARG ARCH
 COPY --from=deploy-env /ulib/* /lib/
 COPY --from=deploy-env /bin/wget /bin/ 
 # copy backend
-RUN uname -m
-COPY antos/backend/$(uname -m)/ /
+ENV ARCH=$(uname -m)
+RUN echo "arch is $ARCH"
+COPY antos/backend/ARCH/ /
 RUN rm /etc/systemd -rf
 # copy frontend
 COPY antos/frontend/ /