From 4be57b07f9a4e363bb8a72e9503fce6ecf1ce692 Mon Sep 17 00:00:00 2001
From: K900 <me@0upti.me>
Date: Fri, 27 Mar 2026 14:48:21 +0300
Subject: [PATCH] nixos/plasma-login-manager: set XDG_DATA_DIRS correctly

This should ensure all the sessions are found by both the daemon
and the greeter.
---
 .../services/display-managers/plasma-login-manager.nix | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/nixos/modules/services/display-managers/plasma-login-manager.nix b/nixos/modules/services/display-managers/plasma-login-manager.nix
index 2101873bad93..8bfcfc37f4f7 100644
--- a/nixos/modules/services/display-managers/plasma-login-manager.nix
+++ b/nixos/modules/services/display-managers/plasma-login-manager.nix
@@ -65,6 +65,16 @@ in
       path = [ cfg.package ];
       wantedBy = [ "graphical.target" ];
       restartIfChanged = false;
+      environment.XDG_DATA_DIRS = lib.mkIf (
+        dmcfg.sessionPackages != [ ]
+      ) "${dmcfg.sessionData.desktops}/share";
+    };
+
+    systemd.user.services.plasma-login = {
+      overrideStrategy = "asDropin";
+      environment.XDG_DATA_DIRS = lib.mkIf (
+        dmcfg.sessionPackages != [ ]
+      ) "${dmcfg.sessionData.desktops}/share";
     };
 
     systemd.defaultUnit = "graphical.target";