mpvScripts.convert: Refactor with `buildLua`

pkgs/applications/video/mpv/scripts/convert.nix

···
-{ stdenvNoCC, fetchgit, lib
+{ lib, fetchgit, buildLua
 , yad, mkvtoolnix-cli, libnotify }:
 
-stdenvNoCC.mkDerivation {
+buildLua {
   pname = "mpv-convert-script";
   version = "2016-03-18";
   src = fetchgit {
···
                 'yad_exe = "${yad}/bin/yad"' \
       --replace 'notify_send_exe = "notify-send"' \
                 'notify_send_exe = "${libnotify}/bin/notify-send"' \
-
   '';
 
-  dontBuild = true;
-  installPhase = ''
-    mkdir -p $out/share/mpv/scripts
-    cp convert_script.lua $out/share/mpv/scripts
-  '';
-  passthru.scriptName = "convert_script.lua";
+  scriptPath = "convert_script.lua";
 
   meta = with lib; {
     description = "Convert parts of a video while you are watching it in mpv";

pkgs/applications/video/mpv/scripts/default.nix

···
     autodeint = callPackage ./autodeint.nix { };
     autoload = callPackage ./autoload.nix { };
     chapterskip = callPackage ./chapterskip.nix { inherit buildLua; };
-    convert = callPackage ./convert.nix { };
+    convert = callPackage ./convert.nix { inherit buildLua; };
     inhibit-gnome = callPackage ./inhibit-gnome.nix { };
     mpris = callPackage ./mpris.nix { };
     mpv-playlistmanager = callPackage ./mpv-playlistmanager.nix { };