diff --git a/yarn-project/aztec-sandbox/Dockerfile b/yarn-project/aztec-sandbox/Dockerfile
index 037d0a71e8d..8154c6680ec 100644
--- a/yarn-project/aztec-sandbox/Dockerfile
+++ b/yarn-project/aztec-sandbox/Dockerfile
@@ -1,9 +1,8 @@
 FROM 278380418400.dkr.ecr.eu-west-2.amazonaws.com/yarn-project AS yarn-project
 
-ARG COMMIT_TAG=""
-
 # Start a new image as we need arch specific.
 FROM node:18-alpine as builder
+ARG COMMIT_TAG=""
 RUN apk add jq
 COPY --from=yarn-project /usr/src/ /usr/src/