[texworks] sh: lualatex: command not found

[Arno Trautmann]

Hi all,

I have weird behavior of texworks when trying to externalize a tikz
figure an in the example below. texworks tells me
––
sh: lualatex: command not found
––
However if I call in my terminal:
––
sh-5.0$ lualatex
This is LuaTeX, Version 1.10.0 (TeX Live 2019)
––
So sh knows lualatex. Also, this did work since a long time and suddenly
stopped about last week. I get the externalization when calling from
terminal, so it seems that texworks is calling something wrong but I
cannot figure out what.

I'm using TeXworks 0.6.3 (AUR) [r.a2470cac, 3/16/19 6:06 PM] on an arch
linux, tried with both TeX Live 2018/9.

Any idea what I'm doing wrong here?

Best,
Arno

––

\documentclass{minimal}

\usepackage{pgfplots}
\usepgfplotslibrary{external}
\tikzexternalize % activate!

\begin{document}
test:
\begin{tikzpicture}
\node at (0,0){};
\end{tikzpicture}
\end{document}