diff --git a/CHANGES b/CHANGES
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+Version 0.6.3.3 released 14 May 2018
+
+* Use build-type Simple (hvr).
+
 Version 0.6.3.2 released 10 Apr 2018
 
 * Update version bounds for dependencies.
diff --git a/filestore.cabal b/filestore.cabal
--- a/filestore.cabal
+++ b/filestore.cabal
@@ -1,7 +1,7 @@
 Name:                filestore
-Version:             0.6.3.2
+Version:             0.6.3.3
 Cabal-Version:       >= 1.10
-Build-type:          Custom
+Build-type:          Simple
 Synopsis:            Interface for versioning file stores.
 Description:         The filestore library provides an abstract interface for a versioning
                      file store, and modules that instantiate this interface.  Currently