diff --git a/scripts/functions.sh b/scripts/functions.sh
index 2570743..6c9e769 100644
--- a/scripts/functions.sh
+++ b/scripts/functions.sh
@@ -408,10 +408,13 @@ function format_zfs_standard() {
 		"${extra_args[@]}"    \
 		rpool                 \
 		"${devices[@]}"       \
+		<<< "$GENTOO_INSTALL_ENCRYPTION_KEY"
 		|| die "Could not create zfs pool on $devices_desc"
 
+	zfs create -o mountpoint=/ rpool/ROOT \
+		|| die "Could not create zfs dataset 'rpool/ROOT'"
 	zfs create -o mountpoint=/ rpool/ROOT/default \
-		|| die "Could not create zfs default dataset"
+		|| die "Could not create zfs dataset 'rpool/ROOT/default'"
 	zpool set bootfs=rpool/ROOT/default rpool \
 		|| die "Could not set zfs property bootfs on rpool"
 }
diff --git a/scripts/utils.sh b/scripts/utils.sh
index f6386d0..93fd8cb 100644
--- a/scripts/utils.sh
+++ b/scripts/utils.sh
@@ -176,7 +176,7 @@ function cache_lsblk_output() {
 function get_device_by_ptuuid() {
 	local ptuuid="${1,,}"
 	local dev
-	if [[ -n $CACHED_LSBLK_OUTPUT ]]; then
+	if [[ -v CACHED_LSBLK_OUTPUT ]]; then
 		dev="$CACHED_LSBLK_OUTPUT"
 	else
 		dev="$(lsblk --all --path --pairs --output NAME,PTUUID,PARTUUID)" \