diff --git a/doc/cuirass.org b/doc/cuirass.org
index 4616dd7..ae073d1 100644
--- a/doc/cuirass.org
+++ b/doc/cuirass.org
@@ -15,12 +15,13 @@ network. The next section describes how to add a new external machine.
 
 * External machines
 
-| Machine    |  Address | Contact         |
-|------------+----------+-----------------|
-| overdrive1 | 10.0.0.3 | Ludovic Courtès |
-| dover      | 10.0.0.4 | Andreas Enge    |
-| guix-x15   | 10.0.0.5 | Simon Josefsson |
-| guix-x15b  | 10.0.0.6 | Simon Josefsson |
+| Machine    |  Address | Contact               |
+|------------+----------+-----------------------|
+| overdrive1 | 10.0.0.3 | Ludovic Courtès       |
+| dover      | 10.0.0.4 | Andreas Enge          |
+| guix-x15   | 10.0.0.5 | Simon Josefsson       |
+| guix-x15b  | 10.0.0.6 | Simon Josefsson       |
+| guixp9     | 10.0.0.7 | Tobias Geerinckx-Rice |
 
 * Connect an external machine
 
diff --git a/hydra/berlin.scm b/hydra/berlin.scm
index f6c25a2..146173b 100644
--- a/hydra/berlin.scm
+++ b/hydra/berlin.scm
@@ -377,7 +377,11 @@ Happy hacking!\n"))
                          (wireguard-peer
                           (name "guix-x15b")
                           (public-key "cwRqmMc8IPAHxFCGIt1WcnJnoWJcefcTXte2vMNi6Wo=")
-                          (allowed-ips '("10.0.0.6/32")))))))
+                          (allowed-ips '("10.0.0.6/32")))
+                        (wireguard-peer
+                         (name "guixp9")
+                         (public-key "4jflGVC+6ee1jsXR/6GgBKjxzw4T4WIwYiMhj/lYQTE=")
+                         (allowed-ips '("10.0.0.7/32")))))))
 
              (frontend-services %sysadmins
                                 ;; Make sure we get enough build users.
@@ -385,7 +389,8 @@ Happy hacking!\n"))
                                 #:build-accounts-to-max-jobs-ratio 5
                                 #:gc-threshold (* 10 TiB)
                                 #:systems '("x86_64-linux" "i686-linux"
-                                            "aarch64-linux")
+                                            "aarch64-linux"
+                                            "powerpc64le-linux")
                                 #:motd %motd
                                 #:publish-workers 8
                                 #:max-jobs 20))))