diff --git a/README.md b/README.md
index 983b6af..0dab67c 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,9 @@ $ nix-shell  # optional but adviced (to get up and running instantly)
 
 Run `./make standalone` to package everything into `xrsh.com`
 
+* development of components (`src/com`) takes places [in this git submodule](https://forgejo.isvery.ninja/xrsh/xrsh-com)
+* development of `xrsh.iso` takes places [in this gitsubmodule](https://forgejo.isvery.ninja/xrsh/xrsh-buildroot)
+
 
 ## Funding