biqu@BTT-CB1:~/klipper-repl/result/bin$ ./klipper-repl ~/printer_data/comms/klippy.sock
/nix/store/844w1zapdic2pfq489dp9lz60s4q51j7-bash-5.2-p15/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
10:04:06 AM ## Connected to Klipper at BTT-CB1:/home/biqu/printer_data/comms/klippy.sock
^C or ^D to quit; type M112 for emergency stop
BTT-CB1:/home/biqu/printer_data/comms/klippy.sock*
It is running successfully now. with nix flake