diff --git a/hydra/machines-for-berlin.scm b/hydra/machines-for-berlin.scm
index d56fa4b..6744d52 100644
--- a/hydra/machines-for-berlin.scm
+++ b/hydra/machines-for-berlin.scm
@@ -1,6 +1,6 @@
 ;; Install this file as /etc/guix/machines.scm on berlin.guix.gnu.org
-(add-to-load-path "/root/maintenance/hydra/modules")
-(use-modules (ice-9 match) (srfi srfi-1) (sysadmin build-machines))
+
+(use-modules (ice-9 match) (srfi srfi-1))
 
 ;; These are all hosted at the MDC in Berlin Buch.  They are connected to
 ;; a dedicated VLAN and can only be accessed from berlin.guix.gnu.org.
@@ -313,15 +313,20 @@
 (define build-machine-name
   (@@ (guix scripts offload) build-machine-name))
 
+(define (childhurd-ip? ip)        ;XXX: copied from (sysadmin build-machines)
+  "Return #t if IP should be running a Childhurd: the first two
+nodes."
+  (member ip '("141.80.167.158" "141.80.167.159")))
+
 (let* ((x86_64 (map template-x86_64 hosts))
        (fast   (filter-map
                 (match-lambda
                   ((name key 128)
                    (find (lambda (machine)
                            (string=? (build-machine-name machine) name))
-                                    x86_64))
-                             (_ #f))
-                           hosts))
+                         x86_64))
+                  (_ #f))
+                hosts))
        (fast/hurd (filter (compose childhurd-ip? build-machine-name) fast)))
   (append overdrive
           honeycomb