+You will need LaTeX installed for this to work, specifically something
+providing `latex` in the path. You will also need either `dvipng` or a
+combination of `dvips` and `convert` from ImageMagick/GraphicsMagick.
+
+On Debian systems, the relevant package names are `texlive-latex-base`
+and either `dvipng` or `graphicsmagick-imagemagick-compat`.