% !TeX program = LuaLaTeX \documentclass{standalone} \usepackage{fontspec} \setmainfont{ocrb10.otf} \newbox\mybox \directlua{ local barracuda = require "barracuda" barracuda:hbox("ean-13", "8006194056290", "mybox") } \begin{document} \box\mybox \end{document}