diff -ruN a/doc/Makefile.am b/doc/Makefile.am
--- a/doc/Makefile.am	2024-01-17 19:29:36.000000000 +0900
+++ b/doc/Makefile.am	2024-03-15 14:07:00.797329756 +0900
@@ -2,7 +2,7 @@
 # Copyright (c) 2005, 2006 Thorsten Kukuk <kukuk@suse.de>
 #
 
-SUBDIRS = man specs sag adg mwg
+SUBDIRS = man sag adg mwg
 
 CLEANFILES = *~
 DISTCLEANFILES = custom-html.xsl custom-man.xsl
diff -ruN a/Makefile.am b/Makefile.am
--- a/Makefile.am	2024-01-17 19:29:36.000000000 +0900
+++ b/Makefile.am	2024-03-15 14:08:14.914704213 +0900
@@ -4,7 +4,7 @@
 
 AUTOMAKE_OPTIONS = 1.9 gnu dist-xz no-dist-gzip check-news
 
-SUBDIRS = libpam tests libpamc libpam_misc modules po conf xtests
+SUBDIRS = libpam tests libpamc libpam_misc modules po doc xtests
 
 if HAVE_DOC
 SUBDIRS += doc