diff --git a/Dockerfile b/Dockerfile
index fca36b3..2eb7443 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,6 +9,7 @@ ARG DEBIAN_VERSION=bullseye-slim
 
 FROM debian:${DEBIAN_VERSION}
 # COPY --from=confd /go/confd/bin/confd /usr/local/bin/confd
+ARG TARGETARCH
 ADD https://github.com/kelseyhightower/confd/releases/download/v0.16.0/confd-0.16.0-linux-${TARGETARCH} /usr/local/bin/confd
 RUN mkdir -p /start.d \
   && printf '#!/bin/bash\nset -e\n/usr/local/bin/confd -onetime -backend env\nrun-parts -v /start.d\nexec ${@}\n' > /entrypoint.sh \