diff --git a/flake.lock b/flake.lock
index d0d8b04..9385af6 100644
--- a/flake.lock
+++ b/flake.lock
@@ -42,16 +42,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1702667777,
-        "narHash": "sha256-qpgZVpFrOEgW0DimJ24UXeFh63TI9fQFXxc58DPtG8Q=",
+        "lastModified": 1702539185,
+        "narHash": "sha256-KnIRG5NMdLIpEkZTnN5zovNYc0hhXjAgv6pfd5Z4c7U=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "203ecda835bcf69633df7183459283543dd4a874",
+        "rev": "aa9d4729cbc99dabacb50e3994dcefb3ea0f7447",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "master",
+        "ref": "nixpkgs-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index 4b6a65b..07126d8 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/master";
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
   inputs.flake-parts.url = "github:hercules-ci/flake-parts";
   inputs.flake-parts.inputs.nixpkgs-lib.follows = "nixpkgs";
   inputs.treefmt-nix.url = "github:numtide/treefmt-nix";