may need a recent version: https://tex.stackexchange.com/a/123438
--- /dev/null
+$pdf_previewer = "start zathura %O %S";
+$clean_ext = "aux out";
+
+# $pdf_update_method = 4;
+# $pdf_update_command = "zathura %O %S";
+
+# Synctex allows one to jump to from the PDF in Zathura to the source in Emacs
+# by Ctrl+click in the PDF.
+# Tell latexmk to use Zathura as a previewer, and run emacsclient as the Synctex
+# editor.
+# $pdf_previewer = 'exec zathura --synctex-forward -x \'emacsclient --no-wait +%{line} %{input}\' %O %S';
+++ /dev/null
-$pdf_previewer = "start zathura %O %S";
-$clean_ext = "aux out";
-
-# $pdf_update_method = 4;
-# $pdf_update_command = "zathura %O %S";
-
-# Synctex allows one to jump to from the PDF in Zathura to the source in Emacs
-# by Ctrl+click in the PDF.
-# Tell latexmk to use Zathura as a previewer, and run emacsclient as the Synctex
-# editor.
-# $pdf_previewer = 'exec zathura --synctex-forward -x \'emacsclient --no-wait +%{line} %{input}\' %O %S';