vhost error_log ignored with passenger

app.rb

require 'sinatra'

get '/' do
  $stderr.puts "stderr"
  $stdout.puts "stdout"
  'got /'
end

config.ru

require 'sinatra'
require 'app.rb'

run Sinatra::Application

nginx.conf

worker_processes  1;

pid        logs/nginx.pid;
events {
    worker_connections  1024;
}

http {
    passenger_root /Library/Ruby/Gems/1.8/gems/passenger-3.0.11;
    passenger_ruby /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby;

    include       mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  logs/access.log  main;

    keepalive_timeout  65;

    server {
        listen      8082;
        access_log  logs/ruby-access.log  main;
        error_log   logs/ruby-error.log;
        root  /Users/paulm/Code/nginx/public;
        location / { 
          passenger_enabled on;
        }
    }
}