self.collect(&:code)

There seems to be a bug in passenger-2.0.6 that makes the Apache module installation fail. I was just installing Ruby Enterprise Edition 1.8.6-20081215 and Phusion Passenger (AKA mod_rack or mod_rails), and it bailed out on me saying:
root@evidence:~# /opt/ruby-enterprise-1.8.6-20081215/bin/passenger-install-apache2-module
[...]
Compiling and installing Apache 2 module…
cd /opt/ruby-enterprise-1.8.6-20081215/lib/ruby/gems/1.8/gems/passenger-2.0.6
/opt/ruby-enterprise-1.8.6-20081215/bin/ruby -S rake clean apache2
/opt/ruby-enterprise-1.8.6-20081215/bin/ruby: No such file or directory — rake [...]