Missing ruby_noexec_wrapper? Put this script on your path and chmod a+x it.

ruby_noexec_wrapper

#!/usr/bin/env ruby

original_file=ARGV[0]
ARGV.shift
$PROGRAM_NAME=original_file

require 'rubygems'

begin
    require 'rubygems-bundler/noexec'
rescue LoadError
    warn "unable to load rubygems-bundler/noexec" if ENV.key?('NOEXEC_DEBUG')
end

eval File.read(original_file), binding, original_file