From a3c75250c4f6d33e1da80e10dd7be663a8f3d6a2 Mon Sep 17 00:00:00 2001
From: Ryan Yin <xiaoyin_c@qq.com>
Date: Wed, 21 Oct 2026 20:38:46 +0800
Subject: [PATCH] fix(restic): catch up backups missed while a host was off

Assisted-by: DeepSeek Harness 0.2.1-rc.2 (claude-opus-5-5)
---
 modules/nixos/base/restic-backup.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/modules/nixos/base/restic-backup.nix b/modules/nixos/base/restic-backup.nix
index 6732cb55..bc398d29 100644
--- a/modules/nixos/base/restic-backup.nix
+++ b/modules/nixos/base/restic-backup.nix
@@ -173,9 +173,12 @@ in
       ]
       ++ cfg.exclude;
 
+      # Setting timerConfig replaces the module default, so keep its
+      # `Persistent`: a host that is off at the slot backs up once it is back.
       timerConfig = {
         OnCalendar = cfg.onCalendar;
         RandomizedDelaySec = cfg.randomizedDelaySec;
+        Persistent = true;
       };
 
       inherit (cfg) pruneOpts;