From c5c0617d6fe6810c35ec56d3116ef523f3f38904 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Tue, 7 Feb 2023 22:59:46 +0100
Subject: [PATCH] Mention --no-sandbox if sandboxing is unsupported

---
 src/libstore/build/local-derivation-goal.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libstore/build/local-derivation-goal.cc b/src/libstore/build/local-derivation-goal.cc
index a99da0b5f..e1cc504f8 100644
--- a/src/libstore/build/local-derivation-goal.cc
+++ b/src/libstore/build/local-derivation-goal.cc
@@ -211,7 +211,7 @@ void LocalDerivationGoal::tryLocalBuild()
     if (useChroot) {
         if (!mountNamespacesSupported() || !pidNamespacesSupported()) {
             if (!settings.sandboxFallback)
-                throw Error("this system does not support the kernel namespaces that are required for sandboxing");
+                throw Error("this system does not support the kernel namespaces that are required for sandboxing; use '--no-sandbox' to disable sandboxing");
             debug("auto-disabling sandboxing because the prerequisite namespaces are not available");
             useChroot = false;
         }