--- manual/s_phys_pkgs/text/exf.tex	2005/08/01 22:31:36	1.5
+++ manual/s_phys_pkgs/text/exf.tex	2005/08/03 04:00:31	1.6
@@ -49,6 +49,11 @@
 or using \texttt{genmake2} adding
 \texttt{-enable=exf} or \texttt{-disable=exf} switches
 %
+\item
+\textit{required packages and CPP options}: \\
+EXF requires the calendar package \texttt{cal} to be enabled;
+no additional CPP options are required.
+%
 \end{itemize}
 (see Section \ref{sect:buildingCode}).