Hello,
the removal of l3num causes make sourcedoc to fail because l3num is still referenced in l3precom.dtx. Patch:
Index: l3in2e/l3precom.dtx
===================================================================
--- l3in2e/l3precom.dtx (revision 1792)
+++ l3in2e/l3precom.dtx (working copy)
@@ -181,7 +181,6 @@
% \begin{macrocode}
%<package>\ProvidesExplPackage
%<package> {\filename}{\filedate}{\fileversion}{\filedescription}
-%<package>\RequirePackage{l3num}
%<package>\RequirePackage{l3io}
%<package>\RequirePackage{l3seq}
%<package>\RequirePackage{l3int}
Regards,
Philipp