Since Inkscape 0.92 it's possible to have a checkerboard background in the document settings.
I noticed that Inkscape SVGs that have the checkerboard enabled have the
inkscape:pagecheckerboard="true" attribute. I tried adding that to the
<group id="template"> in
~/.config/inkscape/preferences.xml, but that doesn't work, and the file is overwritten when I open Inkscape.
How can I enable the checkerboard background as default for new documents?