How do I force the use of base-14 fonts? #1847

What do I need to do to make sure this doesn't use Helvetica (or a substitute) if it happens to be available on the system but instead avoids embedding any fonts into the pdf:

\begin[class=plain,papersize=a4]{document}
\language[main=en]
\font[family=Helvetica]

this is a test.

\end{document}

I've considered using Helvetica Neue LT Std and write a script that manually removes the font object and forces the use of helv... But I figured it's best I'd ask here first instead.

Thanks