From a0b6d84f54438c2219d28d6e6a9460bbccb36f00 Mon Sep 17 00:00:00 2001
From: Martin Weinelt <hexa@darmstadt.ccc.de>
Date: Thu, 2 Feb 2023 17:23:19 +0100
Subject: [PATCH] nixos: Recommend persisting /var/lib/nixos

The `/var/lib/nixos` directory contains the uid and gid map for entities
without a static id. Not persisting them means your user and group ids
could change between reboots, which is likely undesirable.
---
 README.org | 1 +
 nixos.nix  | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/README.org b/README.org
index 7e80452..7e8476c 100644
--- a/README.org
+++ b/README.org
@@ -39,6 +39,7 @@
           directories = [
             "/var/log"
             "/var/lib/bluetooth"
+            "/var/lib/nixos"
             "/var/lib/systemd/coredump"
             "/etc/NetworkManager/system-connections"
             { directory = "/var/lib/colord"; user = "colord"; group = "colord"; mode = "u=rwx,g=rx,o="; }
diff --git a/nixos.nix b/nixos.nix
index f35e6d1..f0fb383 100644
--- a/nixos.nix
+++ b/nixos.nix
@@ -285,6 +285,7 @@ in
                     example = [
                       "/var/log"
                       "/var/lib/bluetooth"
+                      "/var/lib/nixos"
                       "/var/lib/systemd/coredump"
                       "/etc/NetworkManager/system-connections"
                     ];
@@ -349,6 +350,7 @@ in
             directories = [
               "/var/log"
               "/var/lib/bluetooth"
+              "/var/lib/nixos"
               "/var/lib/systemd/coredump"
               "/etc/NetworkManager/system-connections"
               { directory = "/var/lib/colord"; user = "colord"; group = "colord"; mode = "u=rwx,g=rx,o="; }