From 830dd4c72a46b7efa096b2384f8f995d5fa7ca27 Mon Sep 17 00:00:00 2001
From: "Casper V. Kristensen" <casper@vkristensen.dk>
Date: Sat, 30 Mar 2024 23:28:54 +0100
Subject: [PATCH] impermanence: persist /var/lib/nixos/

---
 modules/base/impermanence.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/modules/base/impermanence.nix b/modules/base/impermanence.nix
index 30a4aba..31a492a 100644
--- a/modules/base/impermanence.nix
+++ b/modules/base/impermanence.nix
@@ -34,6 +34,14 @@
         group = "root";
         mode = "1777";
       }
+      # The uid and gid maps for entities without a static id is saved in
+      # /var/lib/nixos. Persist to ensure they aren't changed between reboots.
+      {
+        directory = "/var/lib/nixos";
+        user = "root";
+        group = "root";
+        mode = "0755";
+      }
       # Save the last run time of persistent timers so systemd knows if they were missed
       {
         directory = "/var/lib/systemd/timers";