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-rw-r--r--src/libstore/build.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index 36e3b5e1dd8b..d46286713253 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -1247,6 +1247,7 @@ static string makeValidityRegistration(const PathSet & paths,
 
 DerivationGoal::HookReply DerivationGoal::tryBuildHook()
 {
+    if (!useBuildHook) return rpDecline;
     Path buildHook = getEnv("NIX_BUILD_HOOK");
     if (buildHook == "") return rpDecline;
     buildHook = absPath(buildHook);