diff --git a/morph/lib/default.nix b/morph/lib/default.nix
index 25ae8eb2419b524240618f0a501bed6d96f08252..72d30dd658b7902f65037ac416686c10aa5f290a 100644
--- a/morph/lib/default.nix
+++ b/morph/lib/default.nix
@@ -1,4 +1,7 @@
-rec {
+# Gather up the grid library functionality and present it in a (somewhat)
+# coherent public interface.  Application code should prefer these names over
+# directly importing the source files in this directory.
+{
   hardware-aws = import ./issuer-aws.nix;
 
   issuer = import ./issuer.nix;