diff --git a/opennebula-images/freebsd-zfs-build-opennebula-image.sh b/opennebula-images/freebsd-zfs-build-opennebula-image.sh
index 4964c16..e0d687b 100755
--- a/opennebula-images/freebsd-zfs-build-opennebula-image.sh
+++ b/opennebula-images/freebsd-zfs-build-opennebula-image.sh
@@ -19,7 +19,7 @@ ZPOOL=zroot
 
 ONE_CONTEXT_PKG_URL="https://github.com/OpenNebula/addon-context-linux/releases/download/v6.2.0/one-context-6.2.0_1.txz"
 
-if [ "$(zpool list -Ho name $ZPOOL || true)" = $ZPOOL ]; then
+if zpool list -Ho name $ZPOOL 2>/dev/null; then
 	echo "The pool $ZPOOL is already imported." >&2
 	exit 1
 fi