Утилита modbus scanner

Не устанавливается утилита, ругается:

root@wirenboard-ACS446IO:~# apt update && apt install wb-modbus-ext-scanner
Ign:1 http://deb.debian.org/debian stretch InRelease
Hit:2 http://security.debian.org stretch/updates InRelease                                  
Hit:3 http://deb.debian.org/debian stretch-updates InRelease                                   
Hit:4 http://deb.wirenboard.com/wb7/stretch testing InRelease                                  
Hit:5 http://deb.debian.org/debian stretch Release                       
Hit:6 http://cdn-fastly.deb.debian.org/debian stretch-backports InRelease
Reading package lists... Done
Building dependency tree       
Reading state information... Done
All packages are up to date.
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package wb-modbus-ext-scanner

У вас Debian Stretch, который устарел и новых функций в нём не будет, вам нужен Debian Bullseye.