From 802653e5d1f654ac67c045ca6eea8c8cfa8fc052 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9o=20Gaspard?= <github@leo.gaspard.ninja>
Date: Sun, 30 Mar 2025 16:56:27 +0200
Subject: [PATCH] auto-upgrade: unbreak on unattended, loginctl enable-linger
 systems (#6719)

Fixes https://github.com/nix-community/home-manager/issues/3127
---
 .../services/home-manager-auto-upgrade.nix    | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/modules/services/home-manager-auto-upgrade.nix b/modules/services/home-manager-auto-upgrade.nix
index 659f91181..a1cadeee5 100644
--- a/modules/services/home-manager-auto-upgrade.nix
+++ b/modules/services/home-manager-auto-upgrade.nix
@@ -8,6 +8,16 @@ let
     path = config.programs.home-manager.path;
   };
 
+  autoUpgradeApp = pkgs.writeShellApplication {
+    name = "home-manager-auto-upgrade";
+    text = ''
+      echo "Update Nix's channels"
+      nix-channel --update
+      echo "Upgrade Home Manager"
+      home-manager switch
+    '';
+    runtimeInputs = with pkgs; [ homeManagerPackage nix ];
+  };
 in {
   meta.maintainers = [ lib.hm.maintainers.pinage404 ];
 
@@ -52,14 +62,7 @@ in {
 
       services.home-manager-auto-upgrade = {
         Unit.Description = "Home Manager upgrade";
-
-        Service.ExecStart = toString
-          (pkgs.writeShellScript "home-manager-auto-upgrade" ''
-            echo "Update Nix's channels"
-            ${pkgs.nix}/bin/nix-channel --update
-            echo "Upgrade Home Manager"
-            ${homeManagerPackage}/bin/home-manager switch
-          '');
+        Service.ExecStart = "${autoUpgradeApp}/bin/home-manager-auto-upgrade";
       };
     };
   };