diff --git a/flake.lock b/flake.lock
index f3da86b..f400f82 100644
--- a/flake.lock
+++ b/flake.lock
@@ -69,16 +69,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1708296515,
-        "narHash": "sha256-FyF489fYNAUy7b6dkYV6rGPyzp+4tThhr80KNAaF/yY=",
+        "lastModified": 1708294118,
+        "narHash": "sha256-evZzmLW7qoHXf76VCepvun1esZDxHfVRFUJtumD7L2M=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "b98a4e1746acceb92c509bc496ef3d0e5ad8d4aa",
+        "rev": "e0da498ad77ac8909a980f07eff060862417ccf7",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-unstable",
+        "ref": "nixos-23.11",
         "repo": "nixpkgs",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index 1205b10..81e2189 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,7 +2,7 @@
   description = "Build Zephyr projects on Nix";
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";
 
     pyproject-nix.url = "github:nix-community/pyproject.nix";
     pyproject-nix.inputs.nixpkgs.follows = "nixpkgs";