diff --git a/src/nix-store/nix-store.cc b/src/nix-store/nix-store.cc
index 77ad517a7..6ab62f53a 100644
--- a/src/nix-store/nix-store.cc
+++ b/src/nix-store/nix-store.cc
@@ -840,8 +840,10 @@ static void opServe(Strings opFlags, Strings opArgs)
         settings.buildTimeout = readInt(in);
         if (GET_PROTOCOL_MINOR(clientVersion) >= 2)
             settings.maxLogSize = readInt(in);
-        if (GET_PROTOCOL_MINOR(clientVersion) >= 3)
+        if (GET_PROTOCOL_MINOR(clientVersion) >= 3) {
             settings.set("build-repeat", std::to_string(readInt(in)));
+            settings.set("enforce-determinism", readInt(in) != 0 ? "true" : "false");
+        }
         settings.printRepeatedBuilds = false;
     };
 
@@ -958,6 +960,9 @@ static void opServe(Strings opFlags, Strings opArgs)
 
                 out << status.status << status.errorMsg;
 
+                if (GET_PROTOCOL_MINOR(clientVersion) >= 3)
+                    out << status.timesBuilt << status.isNonDeterministic;
+
                 break;
             }