-AUTOMAKE_OPTIONS=foreign
-SUBDIRS = lib datapath secchan controller utilities man include third-party
+# The goal of -Wno-syntax here is just to suppress the Automake warning
+# about overriding distdir, below.
+AUTOMAKE_OPTIONS=foreign -Wno-syntax
+ACLOCAL_AMFLAGS = -I m4
+SUBDIRS = \
+ lib \
+ datapath \
+ secchan \
+ controller \
+ utilities \
+ switch \
+ tests \
+ include \
+ third-party \
+ debian
+if HAVE_EXT
+SUBDIRS += $(EXT)
+distdir = $(PACKAGE)+ext-$(VERSION)
+endif
+
+DIST_SUBDIRS = $(SUBDIRS)
+
+EXTRA_DIST = README.hwtables
+
+if HAVE_DPKG_BUILDPACKAGE
+distcheck-hook:
+ cd $(srcdir) && dpkg-buildpackage -rfakeroot -us -uc
+ cd $(srcdir) && fakeroot ./debian/rules clean
+else
+distcheck-hook:
+endif