diff --git a/modules/oms/systems.scm b/modules/oms/systems.scm
index dfe4cf3..1573bcd 100644
--- a/modules/oms/systems.scm
+++ b/modules/oms/systems.scm
@@ -108,6 +108,7 @@ sources=[('xkb', 'fi')]"))
           (guix-configuration
             (inherit config)
             (discover? #t)
+            (extra-options '("--max-jobs=1" "--cores=1"))
             (substitute-urls
               (append %default-substitute-urls ; more often used servers first
                       (list "https://substitutes.nonguix.org")))