diff --git a/debianzfs.sh b/debianzfs.sh
index cfbcb1d..8733a6a 100755
--- a/debianzfs.sh
+++ b/debianzfs.sh
@@ -97,16 +97,6 @@ function create_root_pool () {
 		rpool $2
 }
 
-function mirror_grub () {
-	DISK1=$(disk_by_id "$1")
-	DISK2=$(disk_by_id "$2")
-	umount /boot/efi
-	dd if="${DISK1}-part2" of="${DISK2}-part2"
-	efibootmgr -c -g -d "$DISK2" -p 2 \
-		-L "debian-${3}" -l '\EFI\debian\grubx64.efi'
-	mount /boot/efi
-}
-
 function disk_by_id () {
 	disk_check "$1"
 	OUTPUT=$(find /dev/disk/by-id -lname "../../$(basename "$1")" | tail -n1)
@@ -117,6 +107,25 @@ function disk_by_id () {
 	echo "$OUTPUT"
 }
 
+function part_by_uuid () {
+	OUTPUT=$(blkid -s UUID -o value "${1}-part${2}")
+	if [ -z "$OUTPUT" ]; then
+		echo "ERROR: No disk by-uuid label found for: $1"
+		exit 1
+	fi
+	echo "$OUTPUT"
+}
+
+function mirror_grub () {
+	DISK1=$(disk_by_id "$1")
+	DISK2=$(disk_by_id "$2")
+	umount /boot/efi
+	dd if="${DISK1}-part2" of="${DISK2}-part2"
+	efibootmgr -c -g -d "$DISK2" -p 2 \
+		-L "debian-${3}" -l '\EFI\debian\grubx64.efi'
+	mount /boot/efi
+}
+
 ################
 ### Settings ###
 ################
@@ -240,19 +249,25 @@ swapoff --all
 # UEFI booting + boot pool + ZFS native encryption
 disk_format "$DISK"
 DISK_BYID=$(disk_by_id "$DISK")
+DISK_PART2_BYUUID=$(part_by_uuid "$DISK_BYID" 2)
+DISK_PART3_BYUUID=$(part_by_uuid "$DISK_BYID" 3)
+DISK_PART4_BYUUID=$(part_by_uuid "$DISK_BYID" 4)
 if [ -n "$MIRROR" ]; then
 	disk_format "$MIRROR"
 	MIRROR_BYID=$(disk_by_id "$MIRROR")
+	MIRROR_PART2_BYUUID=$(part_by_uuid "$MIRROR_BYID" 2)
+	MIRROR_PART3_BYUUID=$(part_by_uuid "$MIRROR_BYID" 3)
+	MIRROR_PART4_BYUUID=$(part_by_uuid "$MIRROR_BYID" 4)
 fi
 
 # 4. Create the boot pool
 # 5. Create the root pool
 if [ -z "$MIRROR" ]; then
-	create_boot_pool "$ZFSROOT" "${DISK_BYID}-part3"
-	create_root_pool "$ZFSROOT" "${DISK_BYID}-part4" "$RPOOLPW"
+	create_boot_pool "$ZFSROOT" "$DISK_PART3_BYUUID"
+	create_root_pool "$ZFSROOT" "$DISK_PART4_BYUUID" "$RPOOLPW"
 else
-	create_boot_pool "$ZFSROOT" "mirror ${DISK_BYID}-part3 ${MIRROR_BYID}-part3"
-	create_root_pool "$ZFSROOT" "mirror ${DISK_BYID}-part4 ${MIRROR_BYID}-part4" "$RPOOLPW"
+	create_boot_pool "$ZFSROOT" "mirror $DISK_PART3_BYUUID $MIRROR_PART3_BYUUID"
+	create_root_pool "$ZFSROOT" "mirror $DISK_PART4_BYUUID $MIRROR_PART4_BYUUID" "$RPOOLPW"
 fi
 
 ###################################
@@ -353,8 +368,8 @@ if [ -n "$MIRROR" ]; then
 	#!/bin/bash
 	# Post-install GRUB mirror helper script
 	/usr/local/bin/debianzfs \
-		-gm $(disk_by_id "$MIRROR") \
-		$(disk_by_id "$DISK")
+		-gm "$MIRROR_PART2_BYUUID" \
+		"$DISK_PART2_BYUUID"
 	GRUBMIRROR
 fi