biblatex: print surname in small capitals

Question

I found this solution to print all surnames in small capitals, but unfortunately this method doesn't work for me:

\documentclass{article}
\usepackage[
backend=biber
,style=iso-numeric
,sortlocale=cs_CZ
,bibencoding=UTF8
]{biblatex}
\addbibresource{biblatex-examples.bib}
\let\lastnameformat=\textsc
\begin{document}
\cite{aksin,angenendt,baez/article}
\printbibliography
\end{document}

Has anyone an idea whats going on? I'm using the latest texlive on Arch Linux.

Answer 1

The name of the command has been changed:

\documentclass{article}
\usepackage[
backend=biber
,style=iso-numeric
,sortlocale=cs_CZ
,bibencoding=UTF8
]{biblatex}
\addbibresource{biblatex-examples.bib}
\let\familynameformat=\textsc
\begin{document}
\cite{aksin,angenendt,baez/article}
\printbibliography
\end{document}