diff --git a/sys/mailserver/mailserver.nix b/sys/mailserver/mailserver.nix
index 9d46caa..4afeb5b 100644
--- a/sys/mailserver/mailserver.nix
+++ b/sys/mailserver/mailserver.nix
@@ -52,7 +52,7 @@
   };
 
   environment = {
-    systemPackages = with pkgs; [ coreutils-full fd git vim mlocate ];
+    systemPackages = with pkgs; [ coreutils-full fd git vim mlocate busybox ];
   };
 
 }