--- Makefile.in
+++ Makefile.in
@@ -364,7 +364,7 @@
 top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
 ACLOCAL_AMFLAGS = -I m4
-SUBDIRS = src doc tools tests
+SUBDIRS = src
 EXTRA_DIST = PORTS BUGS COPYRIGHT.GPL CREDITS INSTALL.W32 INSTALL.WCE \
 	INSTALL.FIPS build-android.sh .travis.yml
 doc_DATA = INSTALL README TODO COPYING AUTHORS ChangeLog PORTS BUGS \