update_index.patch

diff --git a/lib/rubygems/indexer.rb b/lib/rubygems/indexer.rb
index 9cd32f5..f9cbe68 100644
--- a/lib/rubygems/indexer.rb
+++ b/lib/rubygems/indexer.rb
@@ -586,6 +586,7 @@ class Gem::Indexer
     specs = map_gems_to_specs updated_gems
     prerelease, released = specs.partition { |s| s.version.prerelease? }
 
+    Gem::Specification.dirs = []
     files = build_marshal_gemspecs
 
     Gem.time 'Updated indexes' do