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-rw-r--r--lib/spack/docs/binary_caches.rst1
-rw-r--r--lib/spack/docs/containers.rst10
2 files changed, 11 insertions, 0 deletions
diff --git a/lib/spack/docs/binary_caches.rst b/lib/spack/docs/binary_caches.rst
index eeb6c4b783..dcc09910c7 100644
--- a/lib/spack/docs/binary_caches.rst
+++ b/lib/spack/docs/binary_caches.rst
@@ -182,6 +182,7 @@ section of the configuration:
padded_length: 128
+.. _binary_caches_oci:
-----------------------------------------
OCI / Docker V2 registries as build cache
diff --git a/lib/spack/docs/containers.rst b/lib/spack/docs/containers.rst
index 64ca1df926..acf48e3eae 100644
--- a/lib/spack/docs/containers.rst
+++ b/lib/spack/docs/containers.rst
@@ -24,6 +24,16 @@ image, or to set up a proper entrypoint to run the image. These tasks are
usually both necessary and repetitive, so Spack comes with a command
to generate recipes for container images starting from a ``spack.yaml``.
+.. seealso::
+
+ This page is a reference for generating recipes to build container images.
+ It means that your environment is built from scratch inside the container
+ runtime.
+
+ Since v0.21, Spack can also create container images from existing package installations
+ on your host system. See :ref:`binary_caches_oci` for more information on
+ that topic.
+
--------------------
A Quick Introduction
--------------------