epstopdf
Reimplement https://ctan.org/pkg/epstopdf by texlua to reduce dependency of perl.
For:
\includegraphics{XXX.pdf}
lx add -b graphics-cfg
is enough. For:
\includegraphics{XXX.eps}
Extra build dependency is needed, and make sure you have installed ghostscript in your system.
lx add -b epstopdf