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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 3772f6a00f..0c64e611a0 100644
--- a/lib/rubygems/ext/rake_builder.rb
+++ b/lib/rubygems/ext/rake_builder.rb
@@ -16,7 +16,7 @@ class Gem::Ext::RakeBuilder < Gem::Ext::Builder
end
cmd = ENV['rake'] || 'rake'
- cmd << " RUBYARCHDIR=#{dest_path} RUBYLIBDIR=#{dest_path}"
+ cmd += " RUBYARCHDIR=#{dest_path} RUBYLIBDIR=#{dest_path}" # ENV is frozen
run cmd, results