diff --git a/containers/jug/feature.Dockerfile b/containers/jug/feature.Dockerfile
index 8f6eceb69d1a40fc180ede8dfd0cd1ec6ebdc7c3..acce7cd473547ba2eb31006ffc7dc088f791f49f 100644
--- a/containers/jug/feature.Dockerfile
+++ b/containers/jug/feature.Dockerfile
@@ -7,7 +7,7 @@ ARG INTERNAL_TAG="testing"
 ## in the future once we move the detectors already installed in the main
 ## image.
 
-FROM {DOCKER_REGISTRY}jug_xl:${INTERNAL_TAG}
+FROM ${DOCKER_REGISTRY}jug_xl:${INTERNAL_TAG}
 
 ## also install detector/ip geometries into opt
 ARG DETECTOR=athena