test_genvar.tex

%! TEX program = lualatex
\documentclass[12pt]{article}
\usepackage[paper=a4paper,margin=0.6cm]{geometry}
\usepackage{luacode}
\usepackage{prettytok}
\usepackage{genvar}
\ExplSyntaxOn
\GenerateVariantsFileLog:n {precattl.sty}
\ExplSyntaxOff
\begin{document}

\end{document}