diff --git a/flake.lock b/flake.lock
index 424ed3b0..d99954a9 100644
--- a/flake.lock
+++ b/flake.lock
@@ -59,11 +59,11 @@
         "nixpkgs-regression": "nixpkgs-regression"
       },
       "locked": {
-        "lastModified": 1702090558,
-        "narHash": "sha256-JzuGOltp5Ht9flroZ7g0erD5ud2okNQChw9YlxWDX3c=",
+        "lastModified": 1702228562,
+        "narHash": "sha256-VwvfxT8LZcEm3H+VCMCrKzl7Ip+dHumxPfugAx3tjk8=",
         "owner": "NixOS",
         "repo": "nix",
-        "rev": "c8458bd731eb1c74159bebe459ea00165e056b65",
+        "rev": "b7e016ab2464ad2e7e2e856ad0f173157135aae0",
         "type": "github"
       },
       "original": {
diff --git a/src/hydra-queue-runner/build-remote.cc b/src/hydra-queue-runner/build-remote.cc
index a8047182..1fdd5a23 100644
--- a/src/hydra-queue-runner/build-remote.cc
+++ b/src/hydra-queue-runner/build-remote.cc
@@ -282,7 +282,7 @@ static BuildResult performBuild(
     Store & localStore,
     StorePath drvPath,
     const BasicDerivation & drv,
-    const State::BuildOptions & options,
+    const ServeProto::BuildOptions & options,
     counter & nrStepsBuilding
 )
 {
@@ -293,7 +293,7 @@ static BuildResult performBuild(
         conn.to << options.maxLogSize;
     if (GET_PROTOCOL_MINOR(conn.remoteVersion) >= 3) {
         conn.to
-            << options.repeats // == build-repeat
+            << options.nrRepeats
             << options.enforceDeterminism;
     }
     conn.to.flush();
@@ -458,7 +458,7 @@ void RemoteResult::updateWithBuildResult(const nix::BuildResult & buildResult)
 
 void State::buildRemote(ref<Store> destStore,
     Machine::ptr machine, Step::ptr step,
-    const BuildOptions & buildOptions,
+    const ServeProto::BuildOptions & buildOptions,
     RemoteResult & result, std::shared_ptr<ActiveStep> activeStep,
     std::function<void(StepState)> updateStep,
     NarMemberDatas & narMembers)
@@ -510,7 +510,7 @@ void State::buildRemote(ref<Store> destStore,
         });
 
         try {
-          build_remote::handshake(conn, buildOptions.repeats);
+          build_remote::handshake(conn, buildOptions.nrRepeats);
         } catch (EndOfFile & e) {
             child.pid.wait();
             std::string s = chomp(readFile(result.logFile));
diff --git a/src/hydra-queue-runner/builder.cc b/src/hydra-queue-runner/builder.cc
index 307eee8e..cfa95cef 100644
--- a/src/hydra-queue-runner/builder.cc
+++ b/src/hydra-queue-runner/builder.cc
@@ -98,10 +98,13 @@ State::StepResult State::doBuildStep(nix::ref<Store> destStore,
        it). */
     BuildID buildId;
     std::optional<StorePath> buildDrvPath;
-    BuildOptions buildOptions;
-    buildOptions.repeats = step->isDeterministic ? 1 : 0;
-    buildOptions.maxLogSize = maxLogSize;
-    buildOptions.enforceDeterminism = step->isDeterministic;
+    // Other fields set below
+    nix::ServeProto::BuildOptions buildOptions {
+        .maxLogSize = maxLogSize,
+        .nrRepeats = step->isDeterministic ? 1u : 0u,
+        .enforceDeterminism = step->isDeterministic,
+        .keepFailed = false,
+    };
 
     auto conn(dbPool.get());
 
@@ -136,7 +139,7 @@ State::StepResult State::doBuildStep(nix::ref<Store> destStore,
             {
                 auto i = jobsetRepeats.find(std::make_pair(build2->projectName, build2->jobsetName));
                 if (i != jobsetRepeats.end())
-                    buildOptions.repeats = std::max(buildOptions.repeats, i->second);
+                    buildOptions.nrRepeats = std::max(buildOptions.nrRepeats, i->second);
             }
         }
         if (!build) build = *dependents.begin();
@@ -147,7 +150,7 @@ State::StepResult State::doBuildStep(nix::ref<Store> destStore,
         buildOptions.buildTimeout = build->buildTimeout;
 
         printInfo("performing step ‘%s’ %d times on ‘%s’ (needed by build %d and %d others)",
-            localStore->printStorePath(step->drvPath), buildOptions.repeats + 1, machine->sshName, buildId, (dependents.size() - 1));
+            localStore->printStorePath(step->drvPath), buildOptions.nrRepeats + 1, machine->sshName, buildId, (dependents.size() - 1));
     }
 
     if (!buildOneDone)
diff --git a/src/hydra-queue-runner/state.hh b/src/hydra-queue-runner/state.hh
index 6359063a..830f0598 100644
--- a/src/hydra-queue-runner/state.hh
+++ b/src/hydra-queue-runner/state.hh
@@ -459,7 +459,7 @@ private:
 
     /* How often the build steps of a jobset should be repeated in
        order to detect non-determinism. */
-    std::map<std::pair<std::string, std::string>, unsigned int> jobsetRepeats;
+    std::map<std::pair<std::string, std::string>, size_t> jobsetRepeats;
 
     bool uploadLogsToBinaryCache;
 
@@ -488,12 +488,6 @@ private:
 public:
     State(std::optional<std::string> metricsAddrOpt);
 
-    struct BuildOptions {
-        unsigned int maxSilentTime, buildTimeout, repeats;
-        size_t maxLogSize;
-        bool enforceDeterminism;
-    };
-
 private:
 
     nix::MaintainCount<counter> startDbUpdate();
@@ -578,7 +572,7 @@ private:
 
     void buildRemote(nix::ref<nix::Store> destStore,
         Machine::ptr machine, Step::ptr step,
-        const BuildOptions & buildOptions,
+        const nix::ServeProto::BuildOptions & buildOptions,
         RemoteResult & result, std::shared_ptr<ActiveStep> activeStep,
         std::function<void(StepState)> updateStep,
         NarMemberDatas & narMembers);