- workaround for the regression: build breakage in the 'doc' folder in 0.32.0
- reported to the upstream author Scott Dattalo via e-mail on 2023-11-03.

--- Makefile.in.orig	2023-11-03 16:11:02 UTC
+++ Makefile.in
@@ -387,7 +387,7 @@ top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
 ACLOCAL_AMFLAGS = -I m4
 pkgconfig_DATA = @PACKAGE_NAME@.pc
-SUBDIRS = eXdbm src cli xpms gui modules extras gpsim examples doc regression 
+SUBDIRS = eXdbm src cli xpms gui modules extras gpsim examples regression 
 EXTRA_DIST = PROCESSORS HISTORY README.EXAMPLES ANNOUNCE README.MODULES \
 	README INSTALL.gpsim COPYING.LESSER \
 	config_win32.h.in \