I3wm: mode_system and i3-layout-manager doesn't work

Help
1

Hello, everybody!:grinning_face:
I’m newbie to NixOS (yesterday installed it on my desktop) and I have some issues with it.

  1. Before I used Arch and there were no problems with modes “Resize” and “$mode_system”. Here I see no text “Resize” or “System (l) lock, (e) logout, (s) suspend, (h) hibernate, (r) reboot, (Shift+s) shutdown” which I saw in polybar. Please, help me to fix it.

  2. I wrote in configuration.nix among other pkgs i3-layout-manager, but it doesn’t work - nor by hot-keys, nor by texting command in console. I don’t know why?
    I looked through this forum and searched in network, but there’s no specific information about it.

Thank you for your response and help.