diff --git a/Containerfile b/Containerfile
index 1688f66..062e330 100644
--- a/Containerfile
+++ b/Containerfile
@@ -33,7 +33,7 @@ ARG SOURCE_IMAGE="bluefin"
 # - stable-zfs
 # - stable-nvidia-zfs
 # - (and the above with testing rather than stable)
-ARG SOURCE_SUFFIX="-main"
+ARG SOURCE_SUFFIX="-dx"
 
 ## SOURCE_TAG arg must be a version built for the specific image: eg, 39, 40, gts, latest
 ARG SOURCE_TAG="latest"