diff --git a/flake.lock b/flake.lock
index ec9a00e6..c47a3b88 100644
--- a/flake.lock
+++ b/flake.lock
@@ -12,11 +12,11 @@
         "nixpkgs-regression": []
       },
       "locked": {
-        "lastModified": 1739393420,
-        "narHash": "sha256-jGFuyYKJjJZsBRoi7ZcaVKt1OYxusz/ld1HA7VD2w/0=",
+        "lastModified": 1739899400,
+        "narHash": "sha256-q/RgA4bB7zWai4oPySq9mch7qH14IEeom2P64SXdqHs=",
         "owner": "NixOS",
         "repo": "nix",
-        "rev": "970942f45836172fda410a638853382952189eb9",
+        "rev": "e310c19a1aeb1ce1ed4d41d5ab2d02db596e0918",
         "type": "github"
       },
       "original": {
diff --git a/src/hydra-queue-runner/build-remote.cc b/src/hydra-queue-runner/build-remote.cc
index 27de0496..d3241ccf 100644
--- a/src/hydra-queue-runner/build-remote.cc
+++ b/src/hydra-queue-runner/build-remote.cc
@@ -2,7 +2,6 @@
 
 #include "build-result.hh"
 #include "serve-protocol.hh"
-#include "serve-protocol-impl.hh"
 #include "state.hh"
 #include "current-process.hh"
 #include "processes.hh"
@@ -134,7 +133,7 @@ void State::buildRemote(ref<Store> destStore,
         {
             auto activeStepState(activeStep->state_.lock());
             if (activeStepState->cancelled) throw Error("step cancelled");
-            activeStepState->pid = child->sshPid;
+            activeStepState->pid = conn.store->getConnectionPid();
         }
 
         Finally clearPid([&]() {