diff --git a/docker/build.sh b/docker/build.sh
index 41745f02bb..db25439840 100755
--- a/docker/build.sh
+++ b/docker/build.sh
@@ -3,7 +3,7 @@ set -e
 
 build_args=""
 
-[[ -f ".env" ]] && build_args=$(awk '$1 ~ /\=/ {print "--build-arg " $0 " "}' .env)
+[[ -f ".env" ]] && build_args=$(awk '$1 ~ /\=[^$]/ {print "--build-arg " $0 " "}' .env)
 
 echo "docker-compose build args:"
 echo $build_args