Zathura as default pdf viewer for latexmk


I’m using a hot key for latexmk to compile then preview my pdfs in vim, except it does not recognise my default for pdf viewer set with xdg.

I then tried to add zathura as the default pdf viewer in the ~/.latexmkrc and it does not work wit this. I wondering what else I need to change so that latexmk will use zathura.

Any ideas much appreciated.