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-rw-r--r--ext/purelib.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/purelib.rb b/ext/purelib.rb
index 10ee06176c..284254a8b4 100644
--- a/ext/purelib.rb
+++ b/ext/purelib.rb
@@ -1,3 +1,3 @@
-if nul = $:.index("-")
+if nul = $:.find_index {|path| /\A(?:\.\/)*-\z/ =~ path}
$:[nul..-1] = ["."]
end