Fix shell.nix pin to 23.11

.github/workflows/publish.yml

@@ -31,7 +31,7 @@ jobs:
       - name: Setup Hugo
         uses: peaceiris/actions-hugo@v2
         with:
-          hugo-version: "0.124.1"
+          hugo-version: "0.120.3"
           extended: true
 
       - run: npm ci

shell.nix

@@ -1,10 +1,11 @@
 let
-  channel = "nixos-23.11";
-  pkgs = import <nixpkgs> { };
+  nixpkgs = fetchTarball "https://github.com/NixOS/nixpkgs/tarball/nixos-23.11";
+  pkgs = import nixpkgs { config = { }; overlays = [ ]; };
 in
-pkgs.mkShell {
-  name = "hugo site";
-  buildInputs = [
-    pkgs.hugo
+
+pkgs.mkShellNoCC {
+  packages = with pkgs; [
+    hugo
   ];
+
 }