diff --git a/README.md b/README.md
index 042ecc0..ec6f657 100644
--- a/README.md
+++ b/README.md
@@ -4,16 +4,35 @@ Devuan Docker Base Images
 =========================
 
 Not quite happy with the state of [Devuan][1] [Docker][2] images on
-the [Docker Hub][3], I decided to roll my own.  First cut is just a
-migration from the Debian images following the [instructions][4].
+the [Docker Hub][3], I decided to roll my own.
 
 You can pull this image with
 
 ``` sh
 docker pull registry.gitlab.com/paddy-hack/devuan
+```
+
+Versioned images are available from the [container registry][4] as
+well.
+
+How does this work?
+-------------------
+
+I had to start somewhere, so the first step takes a Debian base image
+and converts that following the Devuan [migration instructions][5].
+The image is pushed to the registry, mainly for reference purposes,
+and used to run Devuan's ``debootstrap``.  This produces a ``rootfs``
+that is imported to the Docker cache, pushed, re-tagged and pushed
+again to the [container registry][4].
+
+BTW, you can pull the migrated image with
+
+``` sh
+docker pull registry.gitlab.com/paddy-hack/devuan/migrated
 ```
 
  [1]: https://devuan.org/
  [2]: https://docker.com/
  [3]: https://hub.docker.com/
- [4]: https://devuan.org/os/documentation/dev1fanboy/Upgrade-to-Devuan
+ [4]: https://gitlab.com/paddy-hack/devuan/container_registry
+ [5]: https://devuan.org/os/documentation/dev1fanboy/Upgrade-to-Devuan