Help for making cntr work in nixos

[leiserfg]

I added cntr and I'm trying to run use it with a breakpointHook in nixos, but I get

sudo cntr attach -t command cntr-/nix/store/02p9zkkq9mvxvdrnmviwdl0ifiq0ms7h-sudachi-vedd7896                      !
cannot create container mountpoint /var/lib/cntr: No such file or directory (os error 2) 

no idea why because the /var/lib/cntr directory exists.

[fidgetingbits]

I've just run into this as well. The first attempt to attach to the build container hangs indefinitely (and leaves what seems to be an unkillable cntr process). Subsequent attempts to attach throw the same error mentioned above. Haven't debugged further yet.