mi configuración para trackear urls distintas a /... si no se coloca $query_string nginx da error cuando colocas por ejemplo /?hola=1

nginx slim framework

```
server {
  server_name www.mysite.com;
  return 301 $scheme://mysite.com$request_uri;
}

server {
  server_name mysite.com;

  root /home/nginx/domains/mysite.com;
  try_files       $uri /index.php?$query_string;

  location ~ ^/(artista|descarga).+\.html$ {
    try_files       $uri /index.php?$query_string;
  }
  location ~ ^/stream/.+\.mp3$ {
    try_files       $uri /index.php?$query_string;
  }

  # ngx_pagespeed & ngx_pagespeed handler
  #include /usr/local/nginx/conf/pagespeed.conf;
  #include /usr/local/nginx/conf/pagespeedhandler.conf;
  #include /usr/local/nginx/conf/pagespeedstatslog.conf;
  
  #logs
  access_log /home/nginx/domains/mysite.com/log/access.log;
  error_log /home/nginx/domains/mysite.com/log/error.log;
    
  include /usr/local/nginx/conf/staticfiles.conf;
  include /usr/local/nginx/conf/php.conf;
  include /usr/local/nginx/conf/drop.conf;
}

```