diff --git a/doc/Makefile.am b/doc/Makefile.am
new file mode 100644
index 0000000..2b65598
--- /dev/null
+++ b/doc/Makefile.am
@@ -0,0 +1,20 @@
+SUBDIRS = \
+	examples \
+	manuals \
+	$(NULL)
+
+msc: \
+	$(NULL)
+
+dot: \
+	$(NULL)
+
+$(builddir)/%.png: $(srcdir)/%.msc
+	mscgen -T png -o $@ $<
+
+$(builddir)/%.png: $(srcdir)/%.dot
+	dot -Tpng $< > $@
+
+.PHONY: poll
+poll:
+	while true; do $(MAKE) msc dot; sleep 1; done