From ff28fffce26bba37685f7e230d1285e7d034f748 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Wed, 22 Sep 2021 14:00:56 +0200
Subject: [PATCH] Don't cache realiseContext() errors

Errors that depend on the configuration (such as whether
allow-import-from-derivation is set) should not be cached.
---
 src/libexpr/primops.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc
index 8a087a781..c98a30177 100644
--- a/src/libexpr/primops.cc
+++ b/src/libexpr/primops.cc
@@ -52,7 +52,8 @@ void EvalState::realiseContext(const PathSet & context)
     if (drvs.empty()) return;
 
     if (!evalSettings.enableImportFromDerivation)
-        throw EvalError("attempted to realize '%1%' during evaluation but 'allow-import-from-derivation' is false",
+        throw Error(
+            "cannot build '%1%' during evaluation because the option 'allow-import-from-derivation' is disabled",
             store->printStorePath(drvs.begin()->drvPath));
 
     /* For performance, prefetch all substitute info. */