diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index abad0f6..8272301 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -8,7 +8,7 @@ build-images:
       - apt update
       - apt install -y xorriso curl genisoimage
       - curl -O https://cdimage.debian.org/cdimage/release/current/amd64/iso-cd/debian-11.3.0-amd64-netinst.iso
-      - xorriso -osirrox on -index debian-11.3.0-amd64-netinst.iso -extract / ./isofiles
+      - xorriso -osirrox on -indev debian-11.3.0-amd64-netinst.iso -extract / ./isofiles
       - chmod +w -R isofiles/
       - gunzip isofiles/install.amd/initrd.gz
       - echo debian/preseed.cfg | cpio -H newc -o -A -F isofiles/install.amd/initrd