Coreboot utils not completing

I have a librem 13 v4, for which I lost the librem USB secure boot device. I want to remove pureboot and go to coreboot, which the coreboot utility should do. Following the instructions after I run

sudio bash

That process runs at 100% and never completes. First time let it run for about 8 hours. In the end I terminated it and tried again, but same thing. Any ideas?

I wonder if this helps:

Those are exactly the instructions I started from.
Ah… but now I see I haven’t tried just downloading the coreboot rom and flashing with that. I’ll try that!