diff --git a/src/iso/build-iso-arch.sh b/src/iso/build-iso-arch.sh
index 9bcc80b..826282e 100755
--- a/src/iso/build-iso-arch.sh
+++ b/src/iso/build-iso-arch.sh
@@ -198,7 +198,8 @@ ok "squashfs: $(du -sh "${ISO_DIR}/LiveOS/rootfs.img" | cut -f1)"
 
 # --- Create EFI boot image ---------------------------------------------------
 info "Creating EFI boot image..."
-ESP_IMG="${BUILD_DIR}/efiboot.img"
+# efiboot.img MUST be inside ISO_DIR so xorriso can find it via -e flag
+ESP_IMG="${ISO_DIR}/efiboot.img"
 ESP_SIZE=8192  # 8MB
 dd if=/dev/zero of="${ESP_IMG}" bs=1K count=${ESP_SIZE} 2>/dev/null
 mkfs.fat -F 12 "${ESP_IMG}" >/dev/null
@@ -215,7 +216,7 @@ xorriso -as mkisofs \
     -rational-rock \
     -volid "${ISO_LABEL}" \
     -eltorito-alt-boot \
-    -e "$(basename "${ESP_IMG}")" \
+    -e "efiboot.img" \
     -no-emul-boot \
     -isohybrid-gpt-basdat \
     -append_partition 2 0xef "${ESP_IMG}" \