diff --git a/osbuild/buildroot.py b/osbuild/buildroot.py
index a6c7d631..6df733b9 100644
--- a/osbuild/buildroot.py
+++ b/osbuild/buildroot.py
@@ -119,6 +119,7 @@ class BuildRoot(contextlib.AbstractContextManager):
             "systemd-nspawn",
             "--quiet",
             "--register=no",
+            "--keep-unit",
             "--as-pid2",
             "--link-journal=no",
             f"--property=DeviceAllow=block-loop {loopback_allow}",