diff --git a/scripts/functions.sh b/scripts/functions.sh
index 37f46cc..348bf4c 100644
--- a/scripts/functions.sh
+++ b/scripts/functions.sh
@@ -735,10 +735,14 @@ gentoo_chroot() {
 			mount --make-rslave "$ROOT_MOUNTPOINT/dev"; } || exit 1
 	) || die "Could not mount virtual filesystems"
 
+	# Cache lsblk output, because apparently it doesn't work correctly in chroot (returns almost no info for devices, e.g. empty uuids)
+	cache_lsblk_output
+
 	# Execute command
 	einfo "Chrooting..."
 	EXECUTED_IN_CHROOT=true \
-		TMP_DIR=$TMP_DIR \
+		TMP_DIR="$TMP_DIR" \
+		CACHED_LSBLK_OUTPUT="$CACHED_LSBLK_OUTPUT" \
 		exec chroot -- "$ROOT_MOUNTPOINT" "$GENTOO_INSTALL_REPO_DIR/scripts/main_chroot.sh" "$@" \
 			|| die "Failed to chroot into '$ROOT_MOUNTPOINT'"
 }
diff --git a/scripts/utils.sh b/scripts/utils.sh
index 3ed7104..0a4d1bc 100644
--- a/scripts/utils.sh
+++ b/scripts/utils.sh
@@ -158,13 +158,20 @@ get_device_by_uuid() {
 	get_device_by_blkid_field 'UUID' "$1"
 }
 
+cache_lsblk_output() {
+	CACHED_LSBLK_OUTPUT="$(lsblk --all --path --pairs --output NAME,PTUUID,PARTUUID)" \
+		|| die "Error while executing lsblk to cache output"
+}
+
 get_device_by_ptuuid() {
-	echo "get_device_by_ptuuid '$ptuuid'"
 	local ptuuid="${1,,}"
 	local dev
-	dev="$(lsblk --all --path --pairs --output NAME,PTUUID,PARTUUID)" \
-		|| die "Error while executing lsblk to find PTUUID=$ptuuid"
-	echo "lsblkout: $dev"
+	if [[ -n $CACHED_LSBLK_OUTPUT ]]; then
+		dev="$CACHED_LSBLK_OUTPUT"
+	else
+		dev="$(lsblk --all --path --pairs --output NAME,PTUUID,PARTUUID)" \
+			|| die "Error while executing lsblk to find PTUUID=$ptuuid"
+	fi
 	dev="$(grep "ptuuid=\"$ptuuid\" partuuid=\"\"" <<< "${dev,,}")" \
 		|| die "Could not find PTUUID=... in lsblk output"
 	dev="${dev%'" ptuuid='*}"