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-rw-r--r--lib/rubygems/ext/rake_builder.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/rubygems/ext/rake_builder.rb b/lib/rubygems/ext/rake_builder.rb
index 52041a2713..077f080c07 100644
--- a/lib/rubygems/ext/rake_builder.rb
+++ b/lib/rubygems/ext/rake_builder.rb
@@ -20,7 +20,7 @@ class Gem::Ext::RakeBuilder < Gem::Ext::Builder
rake = rake.shellsplit
else
begin
- rake = [Gem.ruby, "-rrubygems", Gem.bin_path('rake', 'rake')]
+ rake = [Gem.ruby, "-I#{File.expand_path("..", __dir__)}", "-rrubygems", Gem.bin_path('rake', 'rake')]
rescue Gem::Exception
rake = [Gem.default_exec_format % 'rake']
end