port to flakes

nixos/modules/headphones.nix

@@ -0,0 +1,25 @@
+{ config, pkgs, lib, ... }:
+with lib;
+let
+  cfg = config.dadada.headphones;
+in
+{
+  options = {
+    dadada.headphones = {
+      enable = mkEnableOption "Enable bluetooth headphones with more audio codecs.";
+    };
+  };
+  config = mkIf cfg.enable {
+    hardware = {
+      bluetooth.enable = true;
+      pulseaudio = {
+        enable = true;
+        extraModules = [ pkgs.pulseaudio-modules-bt ];
+        extraConfig = ''
+          set-source-volume 1 10000
+        '';
+        package = pkgs.pulseaudioFull;
+      };
+    };
+  };
+}