What were you trying to do that didn't work?

Install a system with the boot.iso

What is the impact of this issue to you?

Not sure.

Please provide the package NVR for which the bug is seen:

lorax-40.5.12-1.el10

ComposeID: RHEL-10.1-20250617.1

How reproducible is this bug?:

100%

Steps to reproduce

1. Download the boot iso, e.g. RHEL-10.1-20250617.1-s390x-boot.iso
2. Start an installation with command

   # virt-install --memory 2048 --vcpus 2 --os-variant rhel9-unknown --nographics --disk size=10 --cdrom RHEL-10.1-20250617.1-s390x-boot.iso 

Expected results

The anaconda installer is started

Actual results

The boot fails with error

SQUASHFS error: Failed to read block 0x0: -5
dracut: FATAL: Failed to find a root filesystem in /run/install/repo//images/install.img.
dracut: Refusing to continue

Find full output attached.

Additional information

This works well with RHEL 10.0: RHEL-10.0-20250417.2-s390x-boot.iso