diff --git a/shell.nix b/shell.nix
index 8aa1f75..e646471 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,4 +1,9 @@
-(import <nixpkgs> { }).mkShell {
+let
+  nixpkgs = fetchTarball "https://github.com/NixOS/nixpkgs/tarball/nixos-23.11";
+  pkgs = import nixpkgs { config = { }; overlays = [ ]; };
+in
+
+pkgs.mkShell {
   shellHook = ''
     ${(import ./default.nix).pre-commit-check.shellHook}
   '';