xserver.nix is now desktop.nix; WM's can now be added/removed through machine options. Added sway and some fonts.

services/desktop.nix

@@ -0,0 +1,59 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.machine;
+  ifelse = a: b: c: if a then b else c;
+in mkIf (elem "desktop" cfg.services) {
+  programs.sway = mkIf (elem "sway" cfg.desktop.wms) # (import ./desktop/sway.nix { inherit pkgs; });
+{
+    enable = true;
+    extraPackages = with pkgs; [
+      file i3status dmenu
+      qt5.qtwayland
+      grim slurp
+      swaylock
+      swayidle
+      light
+      mako
+      wl-clipboard
+      wf-recorder
+    ];
+    extraSessionCommands = ''
+      export GDK_BACKEND=wayland
+      export CLUTTER_BACKEND=wayland
+      export SDL_VIDEODRIVER=wayland
+      # needs qt5.qtwayland in systemPackages
+      export QT_QPA_PLATFORM=wayland-egl
+      export QT_WAYLAND_FORCE_DPI=physical
+      export QT_WAYLAND_DISABLE_WINDOWDECORATION="1"
+      # Fix for some Java AWT applications (e.g. Android Studio),
+      # use this if they aren't displayed properly:
+      export _JAVA_AWT_WM_NONREPARENTING=1
+    '';
+  };
+
+  services.gnome3.gvfs.enable = true;
+  environment.variables.GIO_EXTRA_MODULES = [ "${pkgs.gnome3.gvfs}/lib/gio/modules" ];
+  services.xserver = {
+    enable = !(elem "sway" cfg.desktop.wms);
+    layout = "de";
+    videoDrivers = [ "intel" ];
+    windowManager = mkIf (cfg.desktop.wms != []) {
+      i3 = mkIf (elem "i3" cfg.desktop.wms) (import ./desktop/i3.nix { inherit pkgs; });
+      default = elemAt cfg.desktop.wms 0;
+    };
+    # add switch for Lilim
+    libinput = {
+      enable = true;
+      tapping = true;
+      disableWhileTyping = false;
+      naturalScrolling = false;
+      horizontalScrolling = true;
+    };
+    # Still waiting for streamlined dpi settings... will write a propper solution once it's done >.<
+    # see https://github.com/NixOS/nixpkgs/pull/25892
+    dpi = ifelse (cfg.hostName == "Lilim") 192 null;
+  };
+}