feat: fw remove unstable packages

hosts/fw/modules/vscode-server.nix

@@ -2,10 +2,6 @@
 
 let
   hostname = "vscode-server";
-  unstable = import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/nixos-unstable.tar.gz") {
-    config = config.nixpkgs.config;
-    system = pkgs.system;
-  };
 in {
   microvm.vms.${hostname} = {
     autostart = true;
@@ -24,7 +20,7 @@ in {
       };
 
       environment.systemPackages = [
-        unstable.ddev
+        pkgs.ddev
       ];
 
       # Docker is required for ddev
@@ -37,4 +33,4 @@ in {
       mac = "02:00:00:00:01:01";
     }];
   };
-}
+}