diff --git a/flake.lock b/flake.lock
index c679e3c..0f133c7 100644
--- a/flake.lock
+++ b/flake.lock
@@ -17,16 +17,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1647186833,
-        "narHash": "sha256-62CMNrhICLcI/5jNSQDAQpUUvtvTXBsYWSU6ZlhPIzs=",
-        "owner": "Mic92",
+        "lastModified": 1650161686,
+        "narHash": "sha256-70ZWAlOQ9nAZ08OU6WY7n4Ij2kOO199dLfNlvO/+pf8=",
+        "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "de173cbbb66e9b454e0e836cec1b807856934539",
+        "rev": "1ffba9f2f683063c2b14c9f4d12c55ad5f4ed887",
         "type": "github"
       },
       "original": {
-        "owner": "Mic92",
-        "ref": "nix-unstable",
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index 5ab579e..8b5bc6c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,9 +1,7 @@
 {
   description = "Hydra's builtin hydra-eval-jobs as a standalone";
 
-  # switch back when https://github.com/NixOS/nixpkgs/pull/164012 is merged
-  #inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
-  inputs.nixpkgs.url = "github:Mic92/nixpkgs/nix-unstable";
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
   inputs.flake-utils.url = "github:numtide/flake-utils";
 
   outputs = { self, nixpkgs, flake-utils }:
@@ -18,7 +16,9 @@
         checks =
           let
             mkVariant = nix: (packages.nix-eval-jobs.override {
-              inherit nix;
+              # TODO: fix to stable after next nix release
+              nix = pkgs.nixUnstable;
+              #inherit nix;
             }).overrideAttrs (_: {
               name = "nix-eval-jobs-${nix.version}";
               inherit (nix) version;
@@ -46,7 +46,9 @@
               touch $out
             '';
 
-            build = mkVariant pkgs.nix;
+            # TODO fix to unstable in next release
+            build = mkVariant pkgs.nixUnstable;
+            #build = mkVariant pkgs.nix;
             build-unstable = mkVariant pkgs.nixUnstable;
           };
 
diff --git a/src/nix-eval-jobs.cc b/src/nix-eval-jobs.cc
index fd33320..628a245 100644
--- a/src/nix-eval-jobs.cc
+++ b/src/nix-eval-jobs.cc
@@ -211,13 +211,15 @@ static void worker(
                 auto localStore = state.store.dynamic_pointer_cast<LocalFSStore>();
                 auto drvPath = localStore->printStorePath(drv->requireDrvPath());
                 auto storePath = localStore->parseStorePath(drvPath);
-                auto outputs = drv->queryOutputs(false);
+                auto outputs = drv->queryOutputs();
 
                 reply["name"] = drv->queryName();
                 reply["system"] = drv->querySystem();
                 reply["drvPath"] = drvPath;
                 for (auto out : outputs){
-                    reply["outputs"][out.first] = localStore->printStorePath(out.second);
+                    if (out.second) {
+                        reply["outputs"][out.first] = localStore->printStorePath(*out.second);
+                    }
                 }
 
                 if (myArgs.meta) {