diff --git a/README.md b/README.md
index 97d6f3c..a756522 100644
--- a/README.md
+++ b/README.md
@@ -82,6 +82,10 @@ is exactly the same it was on your machine.
 If you have a `nixos-rebuild` available on your system, it can automatize these things with the `--flake` and
 `--target-host` parameters. But there are some pitfalls so look at the `nixos-rebuild` documentation beforehand.
 
+### On nodens
+You can build the machine on `nodens` the same way you would build it on your local machine. On `nodens` there
+is a key trusted by all machines at `/run/secrets/nodens-deploy.key`, to sign your build.
+
 ### On the machine
 
 Clone this repository to `/etc/nixos/` and `nixos-rebuild boot` or `nixos-rebuild switch` that will select