From 3d877ecae4b0db229caa782e5de7d00ea362efd6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
Date: Wed, 8 Jan 2025 22:15:45 +0100
Subject: [PATCH] derivation-goal: unlock output lock to avoid deadlock

guix discovered in their code base. Maybe we should do the same.
---
 src/libstore/build/derivation-goal.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/libstore/build/derivation-goal.cc b/src/libstore/build/derivation-goal.cc
index 2ff0ef92f..4d97250d3 100644
--- a/src/libstore/build/derivation-goal.cc
+++ b/src/libstore/build/derivation-goal.cc
@@ -701,6 +701,7 @@ Goal::Co DerivationGoal::tryToBuild()
     if (buildMode != bmCheck && allValid) {
         debug("skipping build of derivation '%s', someone beat us to it", worker.store.printStorePath(drvPath));
         outputLocks.setDeletion(true);
+        outputLocks.unlock();
         co_return done(BuildResult::AlreadyValid, std::move(validOutputs));
     }