\documentclass[aspectratio=43]{beamer}
\usepackage{etoolbox}
\newtoggle{overlabel_includesvgs}
\newtoggle{overlabel_includelabels}

\toggletrue{overlabel_includesvgs}
\toggletrue{overlabel_includelabels}

\input{beamer_slider_preamble.tex}

\begin{document}
\begin{frame}
\maketitle
\end{frame}

\begin{frame}\osvg{myoverlay}
\title{Slide with overlay}
This is some example text!
\end{frame}

\end{document}