fix(unifi): pin mongodb-5_0 for now

requires a manual database upgrade...

flake.lock

@@ -204,6 +204,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-2405": {
+      "locked": {
+        "lastModified": 1731797254,
+        "narHash": "sha256-df3dJApLPhd11AlueuoN0Q4fHo/hagP75LlM5K1sz9g=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "e8c38b73aeb218e27163376a2d617e61a2ad9b59",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-24.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "arcexprs": "arcexprs",
@@ -215,6 +231,7 @@
         "flakelib": "flakelib",
         "home-manager": "home-manager",
         "nixpkgs": "nixpkgs",
+        "nixpkgs-2405": "nixpkgs-2405",
         "sops-nix": "sops-nix",
         "std-fl": "std-fl",
         "systemd2mqtt": "systemd2mqtt",

flake.nix

@@ -2,6 +2,7 @@
   description = "gensokyo.zone";
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    nixpkgs-2405.url = "github:nixos/nixpkgs/nixos-24.05";
     arcexprs = {
       url = "github:arcnmx/nixexprs/master";
       inputs.nixpkgs.follows = "nixpkgs";

nixos/unifi.nix

@@ -1,6 +1,7 @@
 {
   pkgs,
   config,
+  gensokyo-zone,
   lib,
   ...
 }: let
@@ -11,7 +12,12 @@ in {
   services.unifi = {
     enable = mkDefault true;
     unifiPackage = mkDefault pkgs.unifi8;
-    mongodbPackage = mkDefault pkgs.mongodb-6_0;
+    #TODO: mongodbPackage = mkDefault pkgs.mongodb-6_0;
+    mongodbPackage = let
+      nixpkgs = import gensokyo-zone.inputs.nixpkgs-2405 {
+        inherit (pkgs) system config;
+      };
+    in mkDefault nixpkgs.mongodb-5_0;
   };
 
   networking.firewall = mkIf cfg.enable {