Comment 2 for bug 171373

My request was more general, to ensure that the Inkscape Fink package (or
any other one eventually) has this feature, so that users
don't need to change something in /usr/share.

Maybe something like a default markers in /usr/share/inkscape/markers/,
automatically copied at first launch in HOME/.inkscape/
markers or whatever if and only if it does not exist already. And
subsequent loading will load the one in HOME if it exists, otherwise
the one in /usr/share.

This way, the default is memorized, and the customized also.