diff -Naur ruby-1.9.2-p290.orig/tool/rbinstall.rb ruby-1.9.2-p290/tool/rbinstall.rb
--- ruby-1.9.2-p290.orig/tool/rbinstall.rb	2011-01-16 14:18:57.000000000 +0100
+++ ruby-1.9.2-p290/tool/rbinstall.rb	2011-08-29 11:20:23.365904481 +0200
@@ -492,36 +492,7 @@
 end
 
 install?(:ext, :comm, :gem) do
-  directories = []
-  IO.foreach(File.join(srcdir, "lib/rubygems.rb")) do |line|
-    if /^\s*DIRECTORIES\s*=\s*%w\[(.*?)\]/ =~ line
-      directories = $1.split
-      break
-    end
-  end
-  gpath = CONFIG["sitelibdir"].sub(%r'/site_ruby/(?=[^/]+)', '/gems/')
-  prepare "default gems", gpath, directories
-
-  destdir = File.join(gpath, directories.grep(/^spec/)[0])
-  default_gems = [
-    ['rake', 'rake.rb'],
-    ['rdoc', 'rdoc.rb'],
-    ['minitest', 'minitest/unit.rb'],
-  ]
-  default_gems.each do |name, src|
-    src = File.join(srcdir, "lib", src)
-    version = open(src) {|f| f.find {|s| /^\s*\w*VERSION\s*=(?!=)/ =~ s}} or next
-    version = version.split(%r"=\s*", 2)[1].strip[/\A([\'\"])(.*?)\1/, 2]
-    puts "#{" "*30}#{name} #{version}"
-    gemspec = <<-GEMSPEC
-Gem::Specification.new do |s|
-  s.name = #{name.dump}
-  s.version = #{version.dump}
-  s.summary = "This #{name} is bundled with Ruby"
-end
-    GEMSPEC
-    open_for_install(File.join(destdir, "#{name}-#{version}.gemspec"), $data_mode) { gemspec }
-  end
+  # gems are unbundled
 end
 
 parse_args()