Unfortunately I never got it working either on windows or linux, and moved on with my life. But I didn't know what I was doing.

Maybe someone else has had success?

procastino, let me know if you solve it!

I have searched for an answer to this but unable to find the relevant answer. I execute the following command, in order to open an existing .svg file and run an extension on it. (In this case, the extension is called "inkscape-silhouette" and it just sends it to a cutter/plotter.) inkscape...