The website lm-sensors.org has not been working for a few months now [0]. This means we have no upstream source for the packages lm-sensors and i2c-tools.
I've emailed the admin contact named by whois about the situation. [0] Some search engine results for "lm-sensors down" http://www.linux.org/threads/lm-sensors-website-gone-missing.8509/ https://forums.gentoo.org/viewtopic-t-1029120-start-0-postdays-0-postorder-asc-highlight-.html?sid=577a0461886377e6fcbe68e4ccd57562