Disable mongodb as it is currently broken in nixpkgs
diff --git a/src/system.nix b/src/system.nix
index a4661fc..c2c2eae 100644
--- a/src/system.nix
+++ b/src/system.nix
@@ -288,7 +288,7 @@
 
   services.mongodb = {
     package = pkgs.mongodb-5_0;
-    enable = true;
+    enable = false;
     dbpath = "/tmp/mongodb";
   };