diff --git a/flake.lock b/flake.lock
index 9a9046c8..2871e70a 100644
--- a/flake.lock
+++ b/flake.lock
@@ -58,11 +58,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1687379288,
-        "narHash": "sha256-cSuwfiqYfeVyqzCRkU9AvLTysmEuSal8nh6CYr+xWog=",
+        "lastModified": 1701615100,
+        "narHash": "sha256-7VI84NGBvlCTduw2aHLVB62NvCiZUlALLqBe5v684Aw=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "ef0bc3976340dab9a4e087a0bcff661a8b2e87f3",
+        "rev": "e9f06adb793d1cca5384907b3b8a4071d5d7cb19",
         "type": "github"
       },
       "original": {
diff --git a/src/hydra-queue-runner/build-remote.cc b/src/hydra-queue-runner/build-remote.cc
index 94a01676..1d0bcc35 100644
--- a/src/hydra-queue-runner/build-remote.cc
+++ b/src/hydra-queue-runner/build-remote.cc
@@ -113,7 +113,7 @@ static void copyClosureTo(
     Machine::Connection & conn,
     Store & destStore,
     const StorePathSet & paths,
-    bool useSubstitutes = false)
+    SubstituteFlag useSubstitutes = NoSubstitute)
 {
     StorePathSet closure;
     destStore.computeFSClosure(paths, closure);
@@ -290,7 +290,7 @@ static BasicDerivation sendInputs(
             destStore.computeFSClosure(basicDrv.inputSrcs, closure);
             copyPaths(destStore, localStore, closure, NoRepair, NoCheckSigs, NoSubstitute);
         } else {
-            copyClosureTo(conn, destStore, basicDrv.inputSrcs, true);
+            copyClosureTo(conn, destStore, basicDrv.inputSrcs, Substitute);
         }
 
         auto now2 = std::chrono::steady_clock::now();