% if you change this, build manually with pdflatex svg-fallback and
% commit the PDF, too.  This is *not* managed by make.
\documentclass{article}
\usepackage[paperwidth=10cm,paperheight=4cm,margin=0.5cm]{geometry}
\usepackage{xcolor}
\pagestyle{empty}
\begin{document}
\fontfamily{cmss}\selectfont
\vfil
\color{red}
\hrule height 1pt
\color{black}
\vskip 6pt
\noindent PDF fallback: A conversion from SVG to PDF failed.  This is probably
because inkscape is not installed.  While SVG is not supported by
the major TeX engines, it is recommended to commit built PDFs
to the VCS.
\vskip 6pt
\color{red}
\hrule height 1pt
\vfil
\eject
\end{document}
