\printsolutions does not work if the option "-output-directory" is used

[mschneiderwng]

The following command produces exercises and solutions.
lualatex -synctex=1 -interaction=nonstopmode test.tex
The following command creates a pdf with exercises only.
lualatex -synctex=1 -interaction=nonstopmode -output-directory=result test.tex

The test.tex used contains

\documentclass[]{article}
\usepackage{xsim}
\begin{document}
  \begin{exercise}
  	\(x - 1 = 0\)
  \end{exercise}
  \begin{solution}
  	\(x = 1\)
  \end{solution}
  \printsolutions
\end{document}

[cgnieder]

The reason is the usage of the auxiliary file .xsim. Use

\usepackage[use-aux]{xsim}

to prevent the issue.

[mschneiderwng]

That solves the problem. Thank you for your fast response and this awesome package.