diff --git a/documentation/ref-manual/variables.rst b/documentation/ref-manual/variables.rst
index 3eff516f62..52e3e59588 100644
--- a/documentation/ref-manual/variables.rst
+++ b/documentation/ref-manual/variables.rst
@@ -8214,6 +8214,16 @@ system and gives an overview of their function and contents.
              file://.* https://someserver.tld/share/sstate/PATH;downloadfilename=PATH \
              file://.* file:///some-local-dir/sstate/PATH"
 
+      The Yocto Project actually shares the cache data objects built by its
+      autobuilder::
+
+         SSTATE_MIRRORS ?= "file://.* http://cdn.jsdelivr.net/yocto/sstate/all/PATH;downloadfilename=PATH"
+
+      As such binary artifacts are built for the generic QEMU machines
+      supported by the various Poky releases, they are less likely to be
+      reusable in real projects building binaries optimized for a specific
+      CPU family.
+
    :term:`SSTATE_SCAN_FILES`
       Controls the list of files the OpenEmbedded build system scans for
       hardcoded installation paths. The variable uses a space-separated