diff --git a/.nix-version b/.nix-version
index 6842dbd..8b980bc 100644
--- a/.nix-version
+++ b/.nix-version
@@ -1 +1 @@
-unstable
+2_13
diff --git a/default.nix b/default.nix
index a60ed77..982c5e0 100644
--- a/default.nix
+++ b/default.nix
@@ -17,7 +17,7 @@ let
 in
 stdenv.mkDerivation rec {
   pname = "nix-eval-jobs";
-  version = "2.11.0";
+  version = "2.13.0";
   src = if srcDir == null then filterMesonBuild ./. else srcDir;
   buildInputs = [
     nlohmann_json
diff --git a/flake.lock b/flake.lock
index 975744e..4803c32 100644
--- a/flake.lock
+++ b/flake.lock
@@ -22,16 +22,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1674211260,
-        "narHash": "sha256-xU6Rv9sgnwaWK7tgCPadV6HhI2Y/fl4lKxJoG2+m9qs=",
+        "lastModified": 1674380517,
+        "narHash": "sha256-+wjehzo+LlHb34fTlSK0OW8N9Us9+6mzydCVQyIhE9k=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "5ed481943351e9fd354aeb557679624224de38d5",
+        "rev": "4a91562abad9ef3dd581da561e80408ea54e8ab6",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-unstable",
+        "ref": "master",
         "repo": "nixpkgs",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index 9259fab..24efad7 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,7 +1,7 @@
 {
   description = "Hydra's builtin hydra-eval-jobs as a standalone";
 
-  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/master";
   inputs.flake-parts.url = "github:hercules-ci/flake-parts";
   inputs.flake-parts.inputs.nixpkgs-lib.follows = "nixpkgs";
 
diff --git a/src/nix-eval-jobs.cc b/src/nix-eval-jobs.cc
index 4d6c2cd..7b22fc4 100644
--- a/src/nix-eval-jobs.cc
+++ b/src/nix-eval-jobs.cc
@@ -20,6 +20,7 @@
 #include <nix/logging.hh>
 #include <nix/error.hh>
 #include <nix/installables.hh>
+#include <nix/path-with-outputs.hh>
 
 #include <nix/value-to-json.hh>
 
@@ -255,15 +256,15 @@ static void worker(ref<EvalState> state, Bindings &autoArgs, AutoCloseFD &to,
     std::optional<InstallableFlake> flake;
     if (myArgs.flake) {
         auto [flakeRef, fragment, outputSpec] =
-            parseFlakeRefWithFragmentAndOutputsSpec(myArgs.releaseExpr,
-                                                    absPath("."));
+            parseFlakeRefWithFragmentAndExtendedOutputsSpec(myArgs.releaseExpr,
+                                                            absPath("."));
 
         flake.emplace(InstallableFlake({}, state, std::move(flakeRef), fragment,
                                        outputSpec, {}, {},
                                        flake::LockFlags{
                                            .updateLockFile = false,
                                            .useRegistries = false,
-                                           .allowMutable = false,
+                                           .allowUnlocked = false,
                                        }));
     };