From 5a3bd0539427b94ea3174c9b08cfdbd20628d7de Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyich@gmail.com>
Date: Tue, 19 Mar 2024 08:59:57 +0000
Subject: [PATCH] etebase-server: fix the eval on `null` `cfg.unixSocket`

Without the change the test eval fails as:

    $ nix build --no-link -f. etebase-server.tests
       error: cannot coerce null to a string: null
---
 nixos/modules/services/misc/etebase-server.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/nixos/modules/services/misc/etebase-server.nix b/nixos/modules/services/misc/etebase-server.nix
index 546d52b1a3b5..6ec3807f0fb2 100644
--- a/nixos/modules/services/misc/etebase-server.nix
+++ b/nixos/modules/services/misc/etebase-server.nix
@@ -177,6 +177,7 @@ in
 
     systemd.tmpfiles.rules = [
       "d '${cfg.dataDir}' - ${cfg.user} ${config.users.users.${cfg.user}.group} - -"
+    ] ++ lib.optionals (cfg.unixSocket != null) [
       "d '${builtins.dirOf cfg.unixSocket}' - ${cfg.user} ${config.users.users.${cfg.user}.group} - -"
     ];