\documentclass[preview,multi]{standalone}
\usepackage{adjustbox}
\usepackage[kw]{pseudo}
\pseudoset{compact}

\standaloneenv{myenv}

\begin{document}

\begin{myenv}
\begin{adjustbox}{scale=1.25}
\input{readmecode}
\end{adjustbox}
\end{myenv}

\end{document}