From aa2846198f46c1260a91a6bf21a2f53997f1f274 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Fri, 21 Jun 2019 18:34:43 +0200
Subject: Don't update the global registry when building a locked flake

It's unnecessary and slows things down (e.g. when you're on a Thalys
with super-crappy Internet).
---
 src/libexpr/flake/flake.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/libexpr/flake/flake.cc b/src/libexpr/flake/flake.cc
index 215eb85b6..e9db9d80e 100644
--- a/src/libexpr/flake/flake.cc
+++ b/src/libexpr/flake/flake.cc
@@ -119,7 +119,9 @@ static FlakeRef lookupFlake(EvalState & state, const FlakeRef & flakeRef, const
 static SourceInfo fetchFlake(EvalState & state, const FlakeRef & flakeRef, bool impureIsAllowed = false)
 {
     FlakeRef resolvedRef = lookupFlake(state, flakeRef,
-        impureIsAllowed ? state.getFlakeRegistries() : std::vector<std::shared_ptr<FlakeRegistry>>());
+        impureIsAllowed && !flakeRef.isDirect()
+        ? state.getFlakeRegistries()
+        : std::vector<std::shared_ptr<FlakeRegistry>>());
 
     if (evalSettings.pureEval && !impureIsAllowed && !resolvedRef.isImmutable())
         throw Error("requested to fetch mutable flake '%s' in pure mode", resolvedRef);
-- 
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