From 3e91417f82a3e6377064cd34ef7115fa8cdff055 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sandro=20J=C3=A4ckel?= <sandro.jaeckel@gmail.com>
Date: Sun, 14 Sep 2025 23:25:30 +0200
Subject: [PATCH] nixos/chrony: do not require CAP_SYS_TIME when not
 controlling system clock

---
 nixos/modules/services/networking/ntp/chrony.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/nixos/modules/services/networking/ntp/chrony.nix b/nixos/modules/services/networking/ntp/chrony.nix
index 743c53d17039..f852d7a8210a 100644
--- a/nixos/modules/services/networking/ntp/chrony.nix
+++ b/nixos/modules/services/networking/ntp/chrony.nix
@@ -231,7 +231,9 @@ in
 
       path = [ chronyPkg ];
 
-      unitConfig.ConditionCapability = "CAP_SYS_TIME";
+      unitConfig = lib.mkIf (!lib.elem "-x" cfg.extraFlags && !cfg.enableRTCTrimming) {
+        ConditionCapability = "CAP_SYS_TIME";
+      };
       serviceConfig = {
         Type = "notify";
         ExecStart = "${chronyPkg}/bin/chronyd ${builtins.toString chronyFlags}";