How do I configure NixOS to show country flags for every keyboard layout? For example if I use cinnamon and a few layouts usually I set to show country flags in keyboard settings as it’s easier to spot the current language but seems like those icons are missing or nixos configuration doesn’t see it. I didn’t change anything about layouts in configuration file, pretty much the basic settings. I added gnome-icon-theme and adwaita-icon-theme to the system environment but still nothing.