error.log

log from install on ubuntu 12.10 x64 server. 
added the following brightbox ppa:
ppa:brightbox/ruby-ng state=present
ppa:brightbox/passenger-experimental

installed the following packages:
- ruby1.9.3
- ruby-switch
- nginx-full

==> /var/log/nginx/error.log <==
[ 2013-06-08 00:41:38.4344 20226/7fc0aa292700 Pool2/Spawner.h:739 ]: [App 20288 stdout]
[ 2013-06-08 00:41:38.4712 20226/7fc0aa251700 Pool2/Spawner.h:159 ]: [App 20288 stderr] /usr/bin/ruby
[ 2013-06-08 00:41:38.4715 20226/7fc0aa251700 Pool2/Spawner.h:159 ]: [App 20288 stderr] :
[ 2013-06-08 00:41:38.4717 20226/7fc0aa251700 Pool2/Spawner.h:159 ]: [App 20288 stderr] No such file or directory -- /usr/lib/phusion-passenger/helper-scripts/rack-preloader.rb
[ 2013-06-08 00:41:38.4719 20226/7fc0aa251700 Pool2/Spawner.h:159 ]: [App 20288 stderr]  (
[ 2013-06-08 00:41:38.4721 20226/7fc0aa251700 Pool2/Spawner.h:159 ]: [App 20288 stderr] LoadError
[ 2013-06-08 00:41:38.4725 20226/7fc0aa251700 Pool2/Spawner.h:159 ]: [App 20288 stderr] )
[ 2013-06-08 00:41:38.4804 20226/7fc0aa292700 Pool2/Implementation.cpp:774 ]: Could not spawn process for group /home/jewilmeer/www/jewilmeer#default: An error occurred while starting up the preloader. It sent an unknown response type "".
     in 'void Passenger::ApplicationPool2::SmartSpawner::throwPreloaderSpawnException(const string&, Passenger::SpawnException::ErrorKind, Passenger::ApplicationPool2::Spawner::BackgroundIOCapturerPtr&, const DebugDirPtr&)' (SmartSpawner.h:150)
     in 'std::string Passenger::ApplicationPool2::SmartSpawner::negotiatePreloaderStartup(Passenger::ApplicationPool2::SmartSpawner::StartupDetails&)' (SmartSpawner.h:582)
     in 'void Passenger::ApplicationPool2::SmartSpawner::startPreloader()' (SmartSpawner.h:206)
     in 'virtual Passenger::ApplicationPool2::ProcessPtr Passenger::ApplicationPool2::SmartSpawner::spawn(const Passenger::ApplicationPool2::Options&)' (SmartSpawner.h:744)
     in 'void Passenger::ApplicationPool2::Group::spawnThreadRealMain(const SpawnerPtr&, const Passenger::ApplicationPool2::Options&, unsigned int)' (Implementation.cpp:707)

[ 2013-06-08 00:41:38.4810 20226/7fc0a37fe700 agents/HelperAgent/RequestHandler.h:1889 ]: [Client 20] Cannot checkout session. An error occurred while starting up the preloader. It sent an unknown response type "".
Error page:

/usr/bin/ruby: No such file or directory -- /usr/lib/phusion-passenger/helper-scripts/rack-preloader.rb (LoadError)

[ 2013-06-08 00:41:38.4813 20226/7fc0a37fe700 agents/HelperAgent/RequestHandler.h:723 ]: Cannot render an error page: Cannot open '/usr/lib/phusion-passenger/resources/templates/error_layout.css' for reading: No such file or directory (errno=2)
     (empty)

Found the rack-preloader in /usr/share/phusion-passenger/helper-scripts, but how to notify passenger of that location?