diff --git a/hosts/mizuki/nixos.nix b/hosts/mizuki/nixos.nix
index 81c8012..d7bb1f1 100644
--- a/hosts/mizuki/nixos.nix
+++ b/hosts/mizuki/nixos.nix
@@ -1,15 +1,18 @@
-{ config, lib, pkgs, ... }: {
+{ lib, pkgs, ... }: {
 
   environment.shells = with pkgs; [ zsh ];
 
   nix.settings.experimental-features = [ "nix-command" "flakes" ];
 
   nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  nixpkgs.config.allowUnfree = true;
 
   programs.zsh.enable = true;
 
   security.sudo.enable = true;
 
+  services = { mongodb.enable = true; };
+
   users = {
     defaultUserShell = pkgs.zsh;
     users.avery.extraGroups = [ "wheel" ];