--- Makefile.orig	2018-11-07 00:13:13.664811000 +0100
+++ Makefile	2018-11-07 00:15:34.569664000 +0100
@@ -3,6 +3,7 @@
 TESTS        = $(wildcard sql/*.sql)
 REGRESS      = $(patsubst sql/%.sql,%,$(TESTS))
 REGRESS_OPTS = --inputdir=test
+DOCS         = $(wildcard *.md)
 
 PG_CONFIG ?= pg_config