我搜索并发现一些人在尝试安装nokogiri时遇到各种问题，但我没有看到有人跳过这么多或这些类型的文件...有什么想法吗？
gem install nokogiri
Building native extensions. This could take a while...
Successfully installed nokogiri-1.6.0
unable to convert "\xE4" from ASCII-8BIT to UTF-8 for ext/nokogiri/tmp/i686-apple-darwin11/ports/libxml2/2.8.0/libxml2-2.8.0/doc/examples/testWriter.c, skipping
unable to convert "\xF8" from ASCII-8BIT to UTF-8 for ext/nokogiri/tmp/i686-apple-darwin11/ports/libxml2/2.8.0/libxml2-2.8.0/entities.c, skipping
unable to convert "\xE9" from ASCII-8BIT to UTF-8 for ext/nokogiri/tmp/i686-apple-darwin11/ports/libxml2/2.8.0/libxml2-2.8.0/runtest.c, skipping
unable to convert "\xC0" from ASCII-8BIT to UTF-8 for ext/nokogiri/tmp/i686-apple-darwin11/ports/libxml2/2.8.0/libxml2-2.8.0/test/XInclude/ents/isolatin.txt, skipping
unable to convert "\xF8" from ASCII-8BIT to UTF-8 for ext/nokogiri/tmp/i686-apple-darwin11/ports/libxml2/2.8.0/libxml2-2.8.0/testapi.c, skipping
unable to convert "\xF6" from ASCII-8BIT to UTF-8 for ext/nokogiri/tmp/i686-apple-darwin11/ports/libxslt/1.1.26/libxslt-1.1.26/ChangeLog, skipping
unable to convert "\xF6" from ASCII-8BIT to UTF-8 for ext/nokogiri/tmp/i686-apple-darwin11/ports/libxslt/1.1.26/libxslt-1.1.26/libxslt/xslt.c, skipping
unable to convert "\xE1" from ASCII-8BIT to UTF-8 for ext/nokogiri/tmp/i686-apple-darwin11/ports/libxslt/1.1.26/libxslt-1.1.26/NEWS, skipping
unable to convert "\x89" from ASCII-8BIT to UTF-8 for ext/nokogiri/tmp/i686-apple-darwin11/ports/libxslt/1.1.26/libxslt-1.1.26/tests/xmlspec/logo-REC, skipping
unable to convert "\xFD" from ASCII-8BIT to UTF-8 for ext/nokogiri/tmp/i686-apple-darwin11/ports/libxslt/1.1.26/libxslt-1.1.26/win32/Readme.txt, skipping
unable to convert "\xCF" from ASCII-8BIT to UTF-8 for ports/i686-apple-darwin11/libxml2/2.8.0/bin/xmlcatalog, skipping
unable to convert "\xCF" from ASCII-8BIT to UTF-8 for ports/i686-apple-darwin11/libxml2/2.8.0/bin/xmllint, skipping
unable to convert "\xCF" from ASCII-8BIT to UTF-8 for ports/i686-apple-darwin11/libxslt/1.1.26/bin/xsltproc, skipping
1 gem installed