1 files changed, 16 insertions, 0 deletions
diff --git a/nixos/modules/services/x11/display-managers/lightdm.nix b/nixos/modules/services/x11/display-managers/lightdm.nix
index 8078b93a7574..16f1ddea1a75 100644
--- a/nixos/modules/services/x11/display-managers/lightdm.nix
+++ b/nixos/modules/services/x11/display-managers/lightdm.nix
@@ -46,6 +46,7 @@ let
         greeters-directory = ${cfg.greeter.package}
       ''}
       sessions-directory = ${dmcfg.session.desktops}/share/xsessions
+      ${cfg.extraConfig}
 
       [Seat:*]
       xserver-command = ${xserverWrapper}
@@ -61,6 +62,12 @@ let
       ${optionalString hasDefaultUserSession ''
         user-session=${defaultSessionName}
       ''}
+      ${optionalString (dmcfg.setupCommands != "") ''
+        display-setup-script=${pkgs.writeScript "lightdm-display-setup" ''
+          #!${pkgs.bash}/bin/bash
+          ${dmcfg.setupCommands}
+        ''}
+      ''}
       ${cfg.extraSeatDefaults}
     '';
 
@@ -113,6 +120,15 @@ in
         };
       };
 
+      extraConfig = mkOption {
+        type = types.lines;
+        default = "";
+        example = ''
+          user-authority-in-system-dir = true
+        '';
+        description = "Extra lines to append to LightDM section.";
+      };
+
       background = mkOption {
         type = types.str;
         default = "${pkgs.nixos-artwork.wallpapers.simple-dark-gray-bottom}/share/artwork/gnome/nix-wallpaper-simple-dark-gray_bottom.png";