Beaglebone "gem install t" issue

[Erik-k]

I'm trying to set up your t program on my Beaglebone A6 to send and receive tweets from the device. However, when I run "gem install t" I get an error saying that ryah_http_parser.h cannot find sys/types.h. When I edit the ryah_http_parser.h file to point to /usr/include/sys/types.h, and run "$ gem install t" again, I get the same error and the alteration I made to the .h file has been overwritten.

I can't find the point where the gem installer is rewriting ryah_http_parser.h, thus I can't get this filepath change to stick. I don't know anything about ruby, although I'm running the latest version available (1.9.3) which the readme says should work. Do you have any advice?