try conf file backup for haruna

configs/haruna.conf

@@ -0,0 +1,13 @@
+[Audio]
+PreferredLanguage=eng,en,ger,de,jap,ja
+
+[General]
+AppendVideoToSingleInstance=true
+ShowPreviewThumbnail=true
+UseSingleInstance=true
+
+[Playback]
+UseHWDecoding=true
+
+[Subtitles]
+PreferredLanguage=eng,en,ger,de,jap,ja

home.nix

@@ -4,6 +4,7 @@
   imports = [
    ./user/userpkgs.nix
    ./user/plasma.nix
+   ./user/configs.nix
   ];
   home.username = "mo";
   home.homeDirectory = "/home/mo";

user/configs.nix

@@ -0,0 +1,4 @@
+{ config, pkgs, pkgs-stable, ... }:
+{
+home.file".config/haruna/haruna.config".source = ./haruna.config
+}