/usr/ is in ruby-libxml 2.7.0-2.
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..
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/libxml.rb
/usr/lib/ruby/vendor_ruby/libxml/
/usr/lib/ruby/vendor_ruby/libxml/error.rb
/usr/lib/ruby/vendor_ruby/libxml/xpath_object.rb
/usr/lib/ruby/vendor_ruby/libxml/reader.rb
/usr/lib/ruby/vendor_ruby/libxml/hpricot.rb
/usr/lib/ruby/vendor_ruby/libxml/sax_callbacks.rb
/usr/lib/ruby/vendor_ruby/libxml/schema.rb
/usr/lib/ruby/vendor_ruby/libxml/sax_parser.rb
/usr/lib/ruby/vendor_ruby/libxml/node.rb
/usr/lib/ruby/vendor_ruby/libxml/namespace.rb
/usr/lib/ruby/vendor_ruby/libxml/tree.rb
/usr/lib/ruby/vendor_ruby/libxml/html_parser.rb
/usr/lib/ruby/vendor_ruby/libxml/attr_decl.rb
/usr/lib/ruby/vendor_ruby/libxml/attr.rb
/usr/lib/ruby/vendor_ruby/libxml/parser.rb
/usr/lib/ruby/vendor_ruby/libxml/schema/
/usr/lib/ruby/vendor_ruby/libxml/schema/attribute.rb
/usr/lib/ruby/vendor_ruby/libxml/schema/type.rb
/usr/lib/ruby/vendor_ruby/libxml/schema/element.rb
/usr/lib/ruby/vendor_ruby/libxml/namespaces.rb
/usr/lib/ruby/vendor_ruby/libxml/ns.rb
/usr/lib/ruby/vendor_ruby/libxml/properties.rb
/usr/lib/ruby/vendor_ruby/libxml/attributes.rb
/usr/lib/ruby/vendor_ruby/libxml/document.rb
/usr/lib/ruby/vendor_ruby/1.9.1/
/usr/lib/ruby/vendor_ruby/1.9.1/x86_64-linux/
/usr/lib/ruby/vendor_ruby/1.9.1/x86_64-linux/libxml_ruby.so
/usr/lib/ruby/vendor_ruby/xml/
/usr/lib/ruby/vendor_ruby/xml/libxml.rb
/usr/lib/ruby/vendor_ruby/xml.rb
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/ruby/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.0.0/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.0.0/libxml_ruby.so
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-libxml/
/usr/share/doc/ruby-libxml/copyright
/usr/share/doc/ruby-libxml/changelog.Debian.gz
/usr/share/doc/ruby-libxml/README.rdoc.gz
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/1.9.1/
/usr/share/rubygems-integration/1.9.1/specifications/
/usr/share/rubygems-integration/1.9.1/specifications/libxml-ruby-2.7.0.gemspec
/usr/share/rubygems-integration/2.0/
/usr/share/rubygems-integration/2.0/specifications/
/usr/share/rubygems-integration/2.0/specifications/libxml-ruby-2.7.0.gemspec