diff --git a/flake.lock b/flake.lock
index 8c56e383b..71361d4e2 100644
--- a/flake.lock
+++ b/flake.lock
@@ -28,11 +28,11 @@
         "pre-commit-hooks": "pre-commit-hooks"
       },
       "locked": {
-        "lastModified": 1742165831,
-        "narHash": "sha256-/ssmsf50UERQNlOcUuyfvigcnCNckAhAPZMo0+Y3mdY=",
+        "lastModified": 1743065774,
+        "narHash": "sha256-aC1lwnqwHbYRsPfx+lRi32fHRcln0xhIzf0Q7/Lg+vQ=",
         "ref": "refs/heads/main",
-        "rev": "2a336813ad2a4d64d027830507276da32927d215",
-        "revCount": 17664,
+        "rev": "b918f1c307b314daa44407bac60046630f13ed48",
+        "revCount": 17742,
         "type": "git",
         "url": "https://git.lix.systems/lix-project/lix"
       },
@@ -59,11 +59,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1742136038,
-        "narHash": "sha256-DDe16FJk18sadknQKKG/9FbwEro7A57tg9vB5kxZ8kY=",
+        "lastModified": 1742937945,
+        "narHash": "sha256-lWc+79eZRyvHp/SqMhHTMzZVhpxkRvthsP1Qx6UCq0E=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "a1185f4064c18a5db37c5c84e5638c78b46e3341",
+        "rev": "d02d88f8de5b882ccdde0465d8fa2db3aa1169f7",
         "type": "github"
       },
       "original": {
diff --git a/src/hydra-queue-runner/hydra-queue-runner.cc b/src/hydra-queue-runner/hydra-queue-runner.cc
index b71655391..070561020 100644
--- a/src/hydra-queue-runner/hydra-queue-runner.cc
+++ b/src/hydra-queue-runner/hydra-queue-runner.cc
@@ -24,7 +24,6 @@
 #include "lix/libutil/async.hh"
 
 using namespace nix;
-using nlohmann::json;
 
 
 std::string getEnvOrDie(const std::string & key)
@@ -602,7 +601,7 @@ std::optional<PathLock> State::acquireGlobalLock()
 void State::dumpStatus(Connection & conn, AsyncIoRoot & aio)
 {
     time_t now = time(nullptr);
-    json statusJson = {
+    nlohmann::json statusJson = {
         {"status", "up"},
         {"time", time(nullptr)},
         {"uptime", now - startedAt},
@@ -660,7 +659,7 @@ void State::dumpStatus(Connection & conn, AsyncIoRoot & aio)
                 auto & s(m->state);
                 auto info(m->state->connectInfo.lock());
 
-                json machine = {
+                nlohmann::json machine = {
                     {"enabled",  m->enabled},
                     {"systemTypes", m->systemTypesSet},
                     {"supportedFeatures", m->supportedFeatures},
@@ -685,7 +684,7 @@ void State::dumpStatus(Connection & conn, AsyncIoRoot & aio)
         }
 
         {
-            auto jobsets_json = json::object();
+            auto jobsets_json = nlohmann::json::object();
             auto jobsets_(jobsets.lock());
             for (auto & jobset : *jobsets_) {
                 jobsets_json[jobset.first.first + ":" + jobset.first.second] = {
@@ -697,7 +696,7 @@ void State::dumpStatus(Connection & conn, AsyncIoRoot & aio)
         }
 
         {
-            auto machineTypesJson = json::object();
+            auto machineTypesJson = nlohmann::json::object();
             auto machineTypes_(machineTypes.lock());
             for (auto & i : *machineTypes_) {
                 auto machineTypeJson = machineTypesJson[i.first] = {