diff --git a/src/libstore/store-api.cc b/src/libstore/store-api.cc
index 61a12e84a..06d03bff2 100644
--- a/src/libstore/store-api.cc
+++ b/src/libstore/store-api.cc
@@ -305,7 +305,9 @@ void Store::addMultipleToStore(
         [&](const StorePath & path) {
             checkInterrupt();
 
-            auto & [info, source] = *infosMap.at(path);
+            auto & [info_, source] = *infosMap.at(path);
+            auto info = info_;
+            info.ultimate = false;
 
             if (!isValidPath(info.path)) {
                 MaintainCount<decltype(nrRunning)> mc(nrRunning);