Came across this after writing a lua script for conky.
Apparently, there's no lua-cairo binding, and I can't find one in the Void 
packages search.

Looks like lua-devel is installed as a dependency for conky, but is that 
even useful without the cairo binding, as that's what it's most commonly 
used with/for?

Output of conky -v (which shows no lua bindings, at all):

Conky 1.9.0 compiled Thu Feb 27 09:09:22 CET 2014 for Linux 
3.2.0-48-generic (x86_64)

Compiled in features:

System config file: /etc/conky/conky.conf
Package library path: /usr/lib/conky

 X11:
  * Xdamage extension
  * XDBE (double buffer extension)
  * Xft
  * ARGB visual

 Music detection:
  * MPD
  * MOC

 General:
  * math
  * hddtemp
  * portmon
  * Curl
  * RSS
  * Weather (METAR)
  * Weather (XOAP)
  * wireless
  * support for IBM/Lenovo notebooks
  * config-output
  * Imlib2
  * apcupsd
  * iostats
  * ncurses
  * Lua

  Lua bindings: