SVG package runs Inkscape with invalid command line args

There are many questions on includesvg already, so

• yes, I have added --shell-escape to latexmk, lualatexmk and pdflatex in .vscodesettings.json.

  Alternatively I have also put set_tex_cmds( '--shell-escape %O %S' ); in my .latexmkrc file.

• yes, I have Inkscape in my %PATH% and I have restarted VS Code. In the VS Code terminal I get

   > inkscape --version
   Inkscape 1.0.2-2 (e86c870879, 2021-01-15)
   Pango version: 1.48.2
  

• yes, I am not using an extension in includesvg{xxx}.

Still, my includesvg fails. The LaTeX compiler output says

Warning: Option –without-gui= is deprecated

Warning: Option –file= is deprecated

Warning: Option –export-pdf= is deprecated

Unknown Option -z

And somewhere in the log file I find similar stuff:

runsystem(inkscape -z -D --export-latex  --file="img/xxx.svg" --export-pdf="xxx_svg-tex.pdf" )...executed.

It seems to me as if I should change how runcommand() calls Inkscape. Where would I do that?