The find command for NETPATHS in updatedb is different than the others.
For example (line breaks changed for ease of comparison):
# : A8
$find $NETPATHS $FINDOPTIONS
\( -type d -regex "$PRUNEREGEX" -prune \)
-o $print_option || ...
The -prune is inside the parentheses. Compare with, say:
# : A6
$find $SEARCHPATHS $FINDOPTIONS
\( $prunefs_exp -type d -regex "$PRUNEREGEX" \)
-prune -o $print_option || ...
I don't actually use NETPATHS, so I'm not sure if it actually makes a
difference, I just saw it by inspection ...
karl