You might also want to use the `PackageDirectories=` or `Repositories=` option to provide
mkosi with a directory or repository containing the systemd packages that should be installed
instead. If the repository containing the systemd packages is not a builtin repository known
-by mkosi, you can use the `PackageManagerTrees=` option to write an extra repository definition
+by mkosi, you can use the `SandboxTrees=` option to write an extra repository definition
to /etc which is used when building the image instead.
Next, we can build the integration test image with meson: