Answer to myself with the solution for anybody coming here from a search engine.

The gen_grub_cfgstub is executed by Anaconda inside the target system chroot
in /mnt/sysroot so make sure you have grub2-efi-x64 installed inside the target.

In my case it was adding grub2-efi-x64 to %packages in the Kickstart file. Thanks
to Katerina that answered in [1].

Sorry for the noice :)

[1] https://github.com/rhinstaller/anaconda/pull/6544

 
 

Tobias Urdin - Binero

Product Director Cloud Services
P: +46 10 410 26 64  
E: tobias.urdin@binero.com
W: binero.com
Smooth and secure technology across your business
 

Binero Group processes your personal data in accordance with applicable legislation. For more information, please see our privacy policy.

On 10 Apr 2026, at 10:06, Tobias Urdin - Binero <tobias.urdin@binero.com> wrote:

Hello,

I’m having issues reporting a bug through Jira as linked in [1], seems like us
we don’t have any access in the new RedHat Jira to create bug reports so I’m
trying my luck here.

In the c9s 20260402.0 compose [2] the Anaconda installer fails because since change [3]
it tries to execute gen_grub_cfgstub provided by grub2-efi-x64 [4] but that package is not
installed.

This happens when trying to PXE boot an installation using the images/pxeboot/initrd.img
and images/pxeboot/vmlinuz files.

I’m uncertain where the correct fix for this is, anybody with more insight here?

Best regards
Tobias