\documentclass[a4paper, 12pt]{article}

\usepackage{graphics}
\begin{document}
\section{LilyPond snippets with deprecated options}

A snippet with a deprecated option, triggering compatibility mode:

{%
\parindent 0pt
\noindent
\ifx\preLilyPondExample \undefined
\else
  \expandafter\preLilyPondExample
\fi
\def\lilypondbook{}%
\input{47/lily-1d9e8a8d-systems.tex}
\ifx\postLilyPondExample \undefined
\else
  \expandafter\postLilyPondExample
\fi
}

\end{document}