2 files changed, 2 insertions, 2 deletions
diff --git a/src/libstore/build/hook-instance.cc b/src/libstore/build/hook-instance.cc
index cb58a1f02..ea2ae210e 100644
--- a/src/libstore/build/hook-instance.cc
+++ b/src/libstore/build/hook-instance.cc
@@ -35,7 +35,7 @@ HookInstance::HookInstance()
     /* Fork the hook. */
     pid = startProcess([&]() {
 
-        commonChildInit(fromHook);
+        commonChildInit(fromHook.writeSide.get());
 
         if (chdir("/") == -1) throw SysError("changing into /");
 
diff --git a/src/libstore/build/local-derivation-goal.cc b/src/libstore/build/local-derivation-goal.cc
index 6fb9b86e0..61c1cbccf 100644
--- a/src/libstore/build/local-derivation-goal.cc
+++ b/src/libstore/build/local-derivation-goal.cc
@@ -1649,7 +1649,7 @@ void LocalDerivationGoal::runChild()
 
     try { /* child */
 
-        commonChildInit(builderOut);
+        commonChildInit(builderOut.writeSide.get());
 
         try {
             setupSeccomp();