ruby: ERROR: While generating documentation for nokogiri-1.5.0 MESSAGE: "\xE2" from ASCII-8BIT to UTF-8

Если глюкодром под названием руби в очередной раз порадовал ошибкой, в этот раз

===>  Checking if textproc/rubygem-nokogiri already installed 
Building native extensions.  This could take a while... 
Successfully installed nokogiri-1.5.0 
1 gem installed 
Installing RDoc documentation for nokogiri-1.5.0... 
ERROR:  While generating documentation for nokogiri-1.5.0 
... MESSAGE:   "\xE2" from ASCII-8BIT to UTF-8 
... RDOC args: --op /usr/local/lib/ruby/gems/1.9/doc/nokogiri-1.5.0/rdoc 
--main README.rdoc lib Manifest.txt README.ja.rdoc CHANGELOG.rdoc 
CHANGELOG.ja.rdoc README.rdoc ext/nokogiri/xml_sax_push_parser.c 
ext/nokogiri/xml_relax_ng.c ext/nokogiri/html_sax_parser_context.c 
ext/nokogiri/html_entity_lookup.c ext/nokogiri/xml_text.c 
ext/nokogiri/nokogiri.c ext/nokogiri/xml_element_decl.c 
ext/nokogiri/xml_encoding_handler.c ext/nokogiri/html_document.c 
ext/nokogiri/xslt_stylesheet.c ext/nokogiri/xml_attribute_decl.c 
ext/nokogiri/xml_io.c ext/nokogiri/xml_document_fragment.c 
ext/nokogiri/xml_namespace.c ext/nokogiri/xml_libxml2_hacks.c 
ext/nokogiri/xml_sax_parser_context.c ext/nokogiri/xml_comment.c 
ext/nokogiri/xml_sax_parser.c ext/nokogiri/html_element_description.c 
ext/nokogiri/xml_xpath_context.c ext/nokogiri/xml_syntax_error.c 
ext/nokogiri/xml_document.c ext/nokogiri/xml_entity_decl.c 
ext/nokogiri/xml_node.c ext/nokogiri/xml_node_set.c 
ext/nokogiri/xml_reader.c ext/nokogiri/xml_processing_instruction.c 
ext/nokogiri/xml_element_content.c ext/nokogiri/xml_dtd.c 
ext/nokogiri/xml_attr.c ext/nokogiri/xml_schema.c 
ext/nokogiri/xml_cdata.c ext/nokogiri/xml_entity_reference.c --title 
nokogiri-1.5.0 Documentation --quiet 
*** [do-install] Error code 1 

Stop in /usr/ports/textproc/rubygem-nokogiri. 
*** [run-depends] Error code 1 

Stop in /usr/ports/devel/rubygem-capybara. 
*** [run-depends] Error code 1 

Stop in /usr/ports/www/redmine. 
*** [install] Error code 1 

Stop in /usr/ports/www/redmine.  

то в этот раз лечится так:
(sh) export LANG="en_US.UTF-8"; export LC_ALL="en_US.UTF-8";
(csh) setenv LANG "en_US.UTF-8" ; setenv LC_ALL "en_US.UTF-8" ;

и после этого снова собираем нужную либу. Проверено на freebsd 9.

Линки
http://freebsd.1045724.n5.nabble.com/rubygem-nokogiri-error-quot-xE2-quot-from-ASCII-8BIT-to-UTF-8-td5819814.html