From ff1d76b0f3522f3a5d8040bb216cb4331fea2c6f Mon Sep 17 00:00:00 2001
From: RealStickman <mrc@frm01.net>
Date: Fri, 5 May 2023 12:56:17 +0200
Subject: [PATCH] Add source for builting envs

---
 nixos-config/home-manager.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/nixos-config/home-manager.nix b/nixos-config/home-manager.nix
index 2f43cda2..2f768860 100644
--- a/nixos-config/home-manager.nix
+++ b/nixos-config/home-manager.nix
@@ -80,6 +80,7 @@ in
       };
       # user environment variables
       sessionVariables = {
+        # see https://discourse.nixos.org/t/how-to-use-xdg-runtime-dir-in-pam-sessionvariables/10120/3 about the builtin variable
         SSH_AUTH_SOCK = "${builtins.getEnv"XDG_RUNTIME_DIR"}/ssh-agent.socket";
       };
     };