diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index 3233a8d5c..12cfd5ae7 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -3081,7 +3081,7 @@ SubstitutionGoal::~SubstitutionGoal()
     try {
         if (thr.joinable()) {
             thr.join();
-            worker.childTerminated(shared_from_this());
+            //worker.childTerminated(shared_from_this()); // FIXME
         }
     } catch (...) {
         ignoreException();