Hello, Guix Help! Once I've lost root password and need to restore root password in GuixSD.

I've tried to press 'e' in GRUB, added init=/bin/sh and booted into it.

But login screen appeared, if it was the usual boot. And I need to use usb-stick, mount file system, delay root hash from /etc/shadow.

Please, how to get single-user mode in GuixSD?