--- a/tool/rbinstall.rb.~1~	2017-10-30 06:45:20.000000000 +0100
+++ b/tool/rbinstall.rb	2017-12-25 11:06:53.340432435 +0100
@@ -700,20 +700,10 @@
 # :startdoc:
 
 install?(:ext, :comm, :gem, :'default-gems', :'default-gems-comm') do
-  install_default_gem('lib', srcdir)
+  # Gems are unbundled in Gentoo
 end
 install?(:ext, :arch, :gem, :'default-gems', :'default-gems-arch') do
-  install_default_gem('ext', srcdir) do |path|
-    # assume that gemspec and extconf.rb are placed in the same directory
-    success = false
-    begin
-      IO.foreach(File.dirname(path[(srcdir.size+1)..-1]) + "/Makefile") do |l|
-        break success = true if /^TARGET\s*=/ =~ l
-      end
-    rescue Errno::ENOENT
-    end
-    success
-  end
+  # Gems are unbundled in Gentoo
 end
 
 def load_gemspec(file)
@@ -765,68 +755,7 @@
 end
 
 install?(:ext, :comm, :gem, :'bundled-gems') do
-  gem_dir = Gem.default_dir
-  directories = Gem.ensure_gem_subdirectories(gem_dir, :mode => $dir_mode)
-  prepare "bundled gems", gem_dir, directories
-  install_dir = with_destdir(gem_dir)
-  installed_gems = {}
-  options = {
-    :install_dir => install_dir,
-    :bin_dir => with_destdir(bindir),
-    :domain => :local,
-    :ignore_dependencies => true,
-    :dir_mode => $dir_mode,
-    :data_mode => $data_mode,
-    :prog_mode => $prog_mode,
-    :wrappers => true,
-    :format_executable => true,
-  }
-  gem_ext_dir = "#$extout/gems/#{CONFIG['arch']}"
-  extensions_dir = Gem::StubSpecification.gemspec_stub("", gem_dir, gem_dir).extensions_dir
-  Gem::Specification.each_gemspec([srcdir+'/gems/*']) do |path|
-    spec = load_gemspec(path)
-    next unless spec.platform == Gem::Platform::RUBY
-    next unless spec.full_name == path[srcdir.size..-1][/\A\/gems\/([^\/]+)/, 1]
-    spec.extension_dir = "#{extensions_dir}/#{spec.full_name}"
-    if File.directory?(ext = "#{gem_ext_dir}/#{spec.full_name}")
-      spec.extensions[0] ||= "-"
-    end
-    ins = RbInstall::UnpackedInstaller.new(spec, options)
-    puts "#{INDENT}#{spec.name} #{spec.version}"
-    ins.install
-    File.chmod($data_mode, File.join(install_dir, "specifications", "#{spec.full_name}.gemspec"))
-    unless spec.extensions.empty?
-      install_recursive(ext, spec.extension_dir)
-    end
-    installed_gems[spec.full_name] = true
-  end
-  installed_gems, gems = Dir.glob(srcdir+'/gems/*.gem').partition {|gem| installed_gems.key?(File.basename(gem, '.gem'))}
-  unless installed_gems.empty?
-    install installed_gems, gem_dir+"/cache"
-  end
-  next if gems.empty?
-  if defined?(Zlib)
-    Gem.instance_variable_set(:@ruby, with_destdir(File.join(bindir, ruby_install_name)))
-    silent = Gem::SilentUI.new
-    gems.each do |gem|
-      inst = Gem::Installer.new(gem, options)
-      inst.spec.extension_dir = with_destdir(inst.spec.extension_dir)
-      begin
-        Gem::DefaultUserInteraction.use_ui(silent) {inst.install}
-      rescue Gem::InstallError => e
-        next
-      end
-      gemname = File.basename(gem)
-      puts "#{INDENT}#{gemname}"
-    end
-    # fix directory permissions
-    # TODO: Gem.install should accept :dir_mode option or something
-    File.chmod($dir_mode, *Dir.glob(install_dir+"/**/"))
-    # fix .gemspec permissions
-    File.chmod($data_mode, *Dir.glob(install_dir+"/specifications/*.gemspec"))
-  else
-    puts "skip installing bundled gems because of lacking zlib"
-  end
+  # Gems are unbundled in Gentoo
 end
 
 parse_args()