nixos-config/config/services/sway.nix

{
  config,
  pkgs,
  lib,
  ...
}: {
  systemd.user.targets.sway-session = {
    description = "Sway compositor session";
    documentation = ["man:systemd.special(7)"];
    bindsTo = ["graphical-session.target"];
    wants = ["graphical-session-pre.target"];
    after = ["graphical-session-pre.target"];
  };
  programs.sway = {
    enable = true;
    extraPackages = with pkgs; [
      xwayland
      wl-clipboard
      (python38.withPackages (ps: with ps; [i3pystatus keyring]))
    ];
  };

  services.xserver = {
    enable = true;
    displayManager.defaultSession = "sway";
    displayManager.sddm.enable = true;
    libinput.enable = true;
    layout = "de";
    xkbVariant = "neo";
  };
}