1 files changed, 9 insertions, 0 deletions
diff --git a/src/libstore/store-api.cc b/src/libstore/store-api.cc
index f98ba38406d1..11c2f4b02b2e 100644
--- a/src/libstore/store-api.cc
+++ b/src/libstore/store-api.cc
@@ -529,6 +529,15 @@ void copyStorePath(ref<Store> srcStore, ref<Store> dstStore,
     StringSink sink;
     srcStore->narFromPath({storePath}, sink);
 
+    if (srcStore->isTrusted())
+        dontCheckSigs = true;
+
+    if (!info->narHash && dontCheckSigs) {
+        auto info2 = make_ref<ValidPathInfo>(*info);
+        info2->narHash = hashString(htSHA256, *sink.s);
+        info = info2;
+    }
+
     dstStore->addToStore(*info, sink.s, repair, dontCheckSigs);
 }