Updated to nlbuild-autotools 1.6.4.
diff --git a/.default-version b/.default-version
index 0a16f0c..1454f6e 100644
--- a/.default-version
+++ b/.default-version
@@ -1 +1 @@
-4.0d
+4.0.1
diff --git a/CHANGELOG b/CHANGELOG
index e69de29..d885593 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -0,0 +1,4 @@
+4.0.1 (2018-11-15)
+
+        * Updated to nlbuild-autotools 1.6.4.
+