diff --git a/src/hydra-queue-runner/build-remote.cc b/src/hydra-queue-runner/build-remote.cc
index 3dec28ee..fd728205 100644
--- a/src/hydra-queue-runner/build-remote.cc
+++ b/src/hydra-queue-runner/build-remote.cc
@@ -224,7 +224,7 @@ void State::buildRemote(ref<Store> destStore,
            a no-op for regular stores, but for the binary cache store,
            this will copy the inputs to the binary cache from the local
            store. */
-        copyClosure(ref<Store>(localStore), destStore, step->drv.inputSrcs, false, true);
+        copyClosure(ref<Store>(localStore), destStore, step->drv.inputSrcs, NoRepair, NoCheckSigs);
 
         /* Copy the input closure. */
         if (/* machine->sshName != "localhost" */ true) {
@@ -416,7 +416,7 @@ void State::buildRemote(ref<Store> destStore,
 
             to << cmdExportPaths << 0 << outputs;
             to.flush();
-            destStore->importPaths(from, result.accessor, true);
+            destStore->importPaths(from, result.accessor, NoCheckSigs);
 
             /* Release the tokens pertaining to NAR
                compression. After this we only have the uncompressed
diff --git a/src/hydra-queue-runner/hydra-queue-runner.cc b/src/hydra-queue-runner/hydra-queue-runner.cc
index 1aa89663..808033a0 100644
--- a/src/hydra-queue-runner/hydra-queue-runner.cc
+++ b/src/hydra-queue-runner/hydra-queue-runner.cc
@@ -435,8 +435,8 @@ void State::markSucceededBuild(pqxx::work & txn, Build::ptr build,
             (product.type)
             (product.subtype)
             (product.fileSize, product.isRegular)
-            (printHash(product.sha1hash), product.isRegular)
-            (printHash(product.sha256hash), product.isRegular)
+            (product.sha1hash.to_string(Base16, false), product.isRegular)
+            (product.sha256hash.to_string(Base16, false), product.isRegular)
             (product.path)
             (product.name)
             (product.defaultPath).exec();
diff --git a/src/hydra-queue-runner/queue-monitor.cc b/src/hydra-queue-runner/queue-monitor.cc
index 4b3eebf1..09d07342 100644
--- a/src/hydra-queue-runner/queue-monitor.cc
+++ b/src/hydra-queue-runner/queue-monitor.cc
@@ -629,9 +629,9 @@ BuildOutput State::getBuildOutputCached(Connection & conn, nix::ref<nix::Store>
                 product.fileSize = row[2].as<off_t>();
             }
             if (!row[3].is_null())
-                product.sha1hash = parseHash(htSHA1, row[3].as<std::string>());
+                product.sha1hash = Hash(row[3].as<std::string>(), htSHA1);
             if (!row[4].is_null())
-                product.sha256hash = parseHash(htSHA256, row[4].as<std::string>());
+                product.sha256hash = Hash(row[4].as<std::string>(), htSHA256);
             if (!row[5].is_null())
                 product.path = row[5].as<std::string>();
             product.name = row[6].as<std::string>();