diff --git a/autoinstall/build-iso.sh b/autoinstall/build-iso.sh
index 432196d..2887759 100644
--- a/autoinstall/build-iso.sh
+++ b/autoinstall/build-iso.sh
@@ -68,13 +68,10 @@ sed -i "s/set timeout_style=.*/set timeout_style=countdown/" "$GRUB_CFG"
 sed -i "/^\s*linux.*vmlinuz/s/$/ autoinstall quiet ds=nocloud;s=\/cdrom\/nocloud\//" "$GRUB_CFG"
 echo "✓ GRUB patched"
 
-# ── Get EFI partition info for repacking ───────
+# ── Get MBR template from original ISO ─────────
 MBR_TEMPLATE=$(mktemp)
 dd if="$ORIGINAL_ISO" bs=1 count=432 of="$MBR_TEMPLATE" 2>/dev/null
 
-EFI_START=$(fdisk -l "$ORIGINAL_ISO" 2>/dev/null | grep "EFI" | awk '{print $2}')
-EFI_SIZE=$(fdisk -l  "$ORIGINAL_ISO" 2>/dev/null | grep "EFI" | awk '{print $4}')
-
 # ── Repack ISO ─────────────────────────────────
 echo "→ Repacking ISO (this takes ~2 minutes)..."
 xorriso -as mkisofs \
@@ -95,10 +92,9 @@ xorriso -as mkisofs \
   -boot-info-table \
   --grub2-boot-info \
   -eltorito-alt-boot \
-  -e "--interval:appended_partition_2_start_${EFI_START}s_size_${EFI_SIZE}s:all::" \
+  -e "--interval:appended_partition_2:::" \
   -no-emul-boot \
-  -boot-load-size 4 \
-  "$WORK_DIR" 2>/dev/null
+  "$WORK_DIR"
 
 echo ""
 echo "╔══════════════════════════════════════════════════════╗"