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diff --git a/dev-ruby/rubygems/files/gentoo-defaults-3.rb b/dev-ruby/rubygems/files/gentoo-defaults-3.rb
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+++ b/dev-ruby/rubygems/files/gentoo-defaults-3.rb
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+# frozen_string_literal: true
+
+# Gentoo defaults for rubygems 3.x
+#
+# Gentoo policy is to install all manually installed code into
+# /usr/local and to keep /usr managed by Gentoo. This policy file
+# ensures that all manually installed gems using "gem install" are
+# installed in /usr/local. Gentoo gems are installed in /usr.
+
+# TODO: We used to manipulate the default_dir, but this no longer
+# works since this is now the base for the new "default" gems that
+# ruby 2.6 uses with irb. So default_dir should refer to the system
+# default now. rubygems also provides various hooks so we may be able
+# to use those to install gems in /usr/local by default in a less
+# intrusive way.
+module Gem
+
+  class << self
+    def portage_gems_dir
+      ConfigMap[:sitelibdir].gsub('site_ruby', 'gems')
+    end
+
+    def local_dir
+      portage_gems_dir.gsub('@GENTOO_PORTAGE_EPREFIX@/usr',
+                            '@GENTOO_PORTAGE_EPREFIX@/usr/local')
+    end
+
+    def install_dir
+      Process.euid.zero? ? local_dir : user_dir
+    end
+
+    undef :default_path
+    def default_path
+      path = []
+      path << user_dir if user_home && File.exist?(user_home)
+      path << default_dir
+      path << vendor_dir if vendor_dir && File.directory?(vendor_dir)
+      path << local_dir
+      path << portage_gems_dir
+    end
+
+    def system_config_path
+      '@GENTOO_PORTAGE_EPREFIX@/etc'
+    end
+
+    # Set Gentoo defaults for gem commands
+    undef :operating_system_defaults
+    def operating_system_defaults
+      {
+        'install' => "--install-dir #{install_dir}",
+        'uninstall' => "--install-dir #{install_dir}",
+        'update' => "--install-dir #{install_dir}"
+      }
+    end
+
+  end
+end