From 7f176002c67ef0dc92e4adf82095147ea705f70a Mon Sep 17 00:00:00 2001
From: Alois Wohlschlager <alois1@gmx-topmail.de>
Date: Sun, 30 Nov 2025 13:05:12 +0100
Subject: [PATCH] libstore/build: warn when the sandbox is force-enabled due to
 a diverted store

Builds using a diverted store strictly require sandboxing. It therefore makes
sense to automatically enable it even if otherwise explicitly disabled by the
user. However, they should still be informed that their choice is not being
respected.

Change-Id: Ia2cbdc24a4c55d8ecc49094e35e698e16a6a6964
---
 lix/libstore/build/local-derivation-goal.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lix/libstore/build/local-derivation-goal.cc b/lix/libstore/build/local-derivation-goal.cc
index 084b1d6d8..6acc2372f 100644
--- a/lix/libstore/build/local-derivation-goal.cc
+++ b/lix/libstore/build/local-derivation-goal.cc
@@ -229,6 +229,9 @@ retry:
     auto & localStore = getLocalStore();
     if (localStore.config().storeDir != localStore.config().realStoreDir.get()) {
         #if __linux__
+            if (!useChroot) {
+                printTaggedWarning("auto-enabling the sandbox due to using a diverted store");
+            }
             useChroot = true;
         #else
             throw Error("building using a diverted store is not supported on this platform");