Some additional recommended reading...
Lynxline's Inferno Labs on porting Inferno to the Raspberry Pi:
https://github.com/yshurik/inferno-rpi (the related web site http://lynxline.com/ is currently not reachable)
David Boddie's port of Inferno to the Ben NanoNote, a tiny MIPS-based handheld from 2010:
https://www.boddie.org.uk/david/www-repo/Personal/Updates/20...
I'm disappointed to see that the binaries for the Raspberry Pi aren't available anymore at the bitbucket linked on https://github.com/yshurik/inferno-rpi.
I've run Plan9 in the paste on Raspberry Pi and found it to be a neat experience. Inferno I've only run under Windows, and which seemed kind of pointless.