diff -urEbw libvformat-1.13/configure.ac libvformat-1.13.new/configure.ac
--- libvformat-1.13/configure.ac	2002-12-07 17:42:38.000000000 +0100
+++ libvformat-1.13.new/configure.ac	2020-06-12 22:13:36.916481712 +0200
@@ -26,6 +26,6 @@
 AC_FUNC_STAT
 AC_CHECK_FUNCS([atexit memset strstr])
 
-AC_OUTPUT([Makefile src/Makefile vformat/Makefile test/Makefile doc/Makefile])
+AC_OUTPUT([Makefile src/Makefile vformat/Makefile test/Makefile])
 AC_CONFIG_FILES([])
 
diff -urEbw libvformat-1.13/Makefile.am libvformat-1.13.new/Makefile.am
--- libvformat-1.13/Makefile.am	2002-12-07 17:42:38.000000000 +0100
+++ libvformat-1.13.new/Makefile.am	2020-06-12 22:16:21.289604969 +0200
@@ -1,4 +1,4 @@
-SUBDIRS = src vformat test doc
+SUBDIRS = src vformat test
 
 EXTRA_DIST = common/types.h vf_iface.h
 
diff -urEbw libvformat-1.13/Makefile.in libvformat-1.13.new/Makefile.in
--- libvformat-1.13/Makefile.in	2002-12-07 18:31:37.000000000 +0100
+++ libvformat-1.13.new/Makefile.in	2020-06-12 22:18:44.606585319 +0200
@@ -74,7 +74,7 @@
 STRIP = @STRIP@
 VERSION = @VERSION@
 
-SUBDIRS = src vformat test doc
+SUBDIRS = src vformat test
 
 EXTRA_DIST = common/types.h vf_iface.h
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4