diff --git a/Containerfile b/Containerfile
index 5d08ad5..7fbaf17 100644
--- a/Containerfile
+++ b/Containerfile
@@ -36,13 +36,16 @@ ARG SOURCE_IMAGE="silverblue"
 ARG SOURCE_SUFFIX="-main"
 
 ## SOURCE_TAG arg must be a version built for the specific image: eg, 39, 40, gts, latest
-ARG SOURCE_TAG="latest"
+ARG SOURCE_TAG="39"
 
 
 ### 2. SOURCE IMAGE
 ## this is a standard Containerfile FROM using the build ARGs above to select the right upstream image
 FROM ghcr.io/ublue-os/${SOURCE_IMAGE}${SOURCE_SUFFIX}:${SOURCE_TAG}
 
+### 2.1 Add ZFS RPMS
+COPY --from=ghcr.io/ublue-os/ucore-kmods:${SOURCE_TAG} /rpms/kmod/zfs/*.rpm /tmp/rpms
+
 
 ### 3. MODIFICATIONS
 ## make modifications desired in your image and install packages by modifying the build.sh script