diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 5ec2216..a6306f0 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -273,6 +273,9 @@
 
   https://gerrit.openbmc-project.xyz/#/admin/projects/
 
+Please note that all meta-\* layers are separate repositories, so you need to
+follow the [subtree workflow](./subtree.md) when contributing there.
+
 If you're going to be working with Gerrit often, it's useful to create an SSH
 host block in ~/.ssh/config. Ex:
 ```