switch minecraft-server to nixpkgs-unstable for 1.21.8

nixpkgs is currently at 1.21.5 only

hosts/hyrule/default.nix

@@ -1,5 +1,6 @@
 {
   pkgs,
+  pkgs-unstable,
   inputs,
   lib,
   ...
@@ -31,12 +32,14 @@ in {
     ];
   };
 
-  nixpkgs.config.allowUnfreePredicate = let
-    whitelist = map lib.getName [
-      pkgs.minecraft-server
-    ];
-  in
-    pkg: builtins.elem (lib.getName pkg) whitelist;
+  # nixpkgs.config.allowUnfreePredicate = let
+  #   whitelist = map lib.getName [
+  #     "minecraft-server"
+  #     pkgs.minecraft-server
+  #     pkgs-unstable.minecraft-server
+  #   ];
+  # in
+  #   pkg: builtins.elem (lib.getName pkg) whitelist;
 
   time.timeZone = "Australia/Brisbane";
 

hosts/hyrule/minecraft-server.nix

@@ -1,10 +1,16 @@
-{pkgs, ...}: {
+{
+  pkgs,
+  pkgs-unstable,
+  ...
+}: {
   services.minecraft-server = {
     enable = true;
+    package = pkgs-unstable.minecraft-server; # use latest version only!
+    declarative = true;
+
     eula = true;
 
     openFirewall = false; # do this manually instead
-    declarative = true;
 
     whitelist = {
       "SECRET1" = "";