diff --git a/scripts/update-base.sh b/scripts/update-base.sh
index c20a6b4..70be6d3 100755
--- a/scripts/update-base.sh
+++ b/scripts/update-base.sh
@@ -18,27 +18,27 @@ elif [ "${BACKEND}" = "base" ]; then
   if [ "${PKG_PROXY}" != "no" ]; then
     export HTTP_PROXY="${PKG_PROXY}"
   fi
+  if [ "${RUST}" = "YES" ]; then
+    rustdate=$(which freebsd-rustdate || true)
+    unset HTTP_PROXY
+    if [ -z "${rustdate}" ]; then
+      jexec "${jail_name}" pkg install -y freebsd-rustdate
+    fi
+  fi
   if [ -z "${JAIL}" ]; then
     cd "${BASE_WORKDIR}"
-    jls -N | egrep -v ' *JID' | awk '{print $1}' | while read jail_name; do
+    jls -N | egrep -v ' *JID' | egrep -v ' ^svcj' | awk '{print $1}' | while read jail_name; do
       if [ -x "${jail_name}/bin/freebsd-version" ]; then
         export CURRENTLY_RUNNING="$(jexec "${jail_name}" freebsd-version -u)"
         CURRENTLY_RUNNING_FLAVOR="$(echo "${CURRENTLY_RUNNING}" | cut -f 2 -d '-')"
         if [ "${CURRENTLY_RUNNING_FLAVOR}" = "RELEASE" ]; then
-          echo "=== ${jail_name} ==="
+          echo "=== ${jail_name} cvrc ==="
           if [ "${RUST}" = "YES" ]; then
-            rustdate=$(jexec "${jail_name}" which freebsd-rustdate || true)
-            if [ -z "${rustdate}" ]; then
-              jexec "${jail_name}" pkg install -y freebsd-rustdate
-            fi
-            jexec "${jail_name}" freebsd-rustdate fetch
-            jexec "${jail_name}" freebsd-rustdate install
+            JAIL_ROOT="$(jls -N -j network path)"
+            ${rustdate} -b "${JAIL_ROOT}" fetch
+            ${rustdate} -b "${JAIL_ROOT}" install
           else
-            jexec "${jail_name}" \
-              freebsd-update \
-              --not-running-from-cron \
-              --currently-running "${CURRENTLY_RUNNING}" \
-              fetch install
+            freebsd-update -j "${jail_name}" --not-running-from-cron fetch install
             echo
           fi
         fi
@@ -47,12 +47,14 @@ elif [ "${BACKEND}" = "base" ]; then
     cd -
   elif [ -x "${BASE_WORKDIR}/${JAIL}/bin/freebsd-version" ]; then
     echo "=== ${JAIL} ==="
-    export CURRENTLY_RUNNING="$(jexec "${JAIL}" freebsd-version -u)"
-    jexec "${JAIL}" \
-      freebsd-update \
-      --not-running-from-cron \
-      --currently-running "${CURRENTLY_RUNNING}" \
-      fetch install
+    if [ "${RUST}" = "YES" ]; then
+      unset HTTP_PROXY
+      JAIL_ROOT="$(jls -N -j network path)"
+      ${rustdate} -b "${JAIL_ROOT}" fetch
+      ${rustdate} -b "${JAIL_ROOT}" install
+    else
+      freebsd-update -j "${jail_name}" --not-running-from-cron fetch install
+    fi
   else
     echo "No such jail \"${JAIL}\"!" >&2
     exit 1