The same on debian 10.10 while trying to do: debirf make minimal
I noticed that this missing file exist in another directory: /root/DEBIRF/minimal/root/usr/lib/klibc-s9qQdCstNfYRDSY0VN-k2cEOgUE.so Fixed /usr/bin/debirf, but then getting kernel panic while booting from that ISO. Regards PetrasL