Downgrade jellyfin

flake.lock

@@ -168,6 +168,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-old": {
+      "locked": {
+        "lastModified": 1764939437,
+        "narHash": "sha256-4TLFHUwXraw9Df5mXC/vCrJgb50CRr3CzUzF0Mn3CII=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "00d2457e2f608b4be6fe8b470b0a36816324b0ae",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-25.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgs-unstable": {
       "locked": {
         "lastModified": 1764950072,
@@ -254,6 +270,7 @@
         "disko": "disko",
         "foundryvtt": "foundryvtt",
         "nixpkgs": "nixpkgs_4",
+        "nixpkgs-old": "nixpkgs-old",
         "nixpkgs-unstable": "nixpkgs-unstable",
         "simple-nixos-mailserver": "simple-nixos-mailserver",
         "sops-nix": "sops-nix"

flake.nix

@@ -1,6 +1,7 @@
 {
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-25.11";
+    nixpkgs-old.url = "github:nixos/nixpkgs/nixos-25.05";
     nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
     disko.url = "github:nix-community/disko";
     sops-nix.url = "github:Mic92/sops-nix";
@@ -14,6 +15,7 @@
     inputs@{
       self,
       nixpkgs,
+      nixpkgs-old,
       nixpkgs-unstable,
       disko,
       deploy-rs,
@@ -28,6 +30,7 @@
       defaultModuleArgs =
         { pkgs, ... }:
         {
+          _module.args.pkgs-old = import nixpkgs-old { system = "x86_64-linux"; };
           _module.args.pkgs-unstable = import nixpkgs-unstable {
             system = "x86_64-linux";
             config.allowUnfreePredicate = pkg: builtins.elem (pkgs.lib.getName pkg) [ "minecraft-server" ];

modules/jellyfin.nix

@@ -1,4 +1,9 @@
-{ config, lib, ... }:
+{
+  config,
+  lib,
+  pkgs-old,
+  ...
+}:
 let
   cfg = config.custom.services.jellyfin;
 in
@@ -10,6 +15,8 @@ in
   config = lib.mkIf cfg.enable {
     services.jellyfin = {
       enable = true;
+      # Downgrade because of https://github.com/jellyfin/jellyfin/issues/15388
+      package = pkgs-old.jellyfin;
       dataDir = "/nix/var/data/jellyfin";
     };