diff --git a/containers/jug/dev.Dockerfile b/containers/jug/dev.Dockerfile
index b79d1a2f..a37cc90b 100644
--- a/containers/jug/dev.Dockerfile
+++ b/containers/jug/dev.Dockerfile
@@ -181,7 +181,7 @@ make --jobs ${jobs} --keep-going --directory /opt/spack-environment \
   SPACK_ENV=${SPACK_ENV} \
   BUILDCACHE_OCI_PROMPT="eicweb" \
   BUILDCACHE_OCI_FINAL="ghcr" \
-  BUILDCACHE_S3_FINAL="eics3rw"
+  BUILDCACHE_S3_PROMPT="eics3rw"
 ccache --show-stats
 ccache --zero-stats
 EOF