diff --git a/modules/common/filesystems.nix b/modules/common/filesystems.nix
new file mode 100644
index 0000000..a8ac3df
--- /dev/null
+++ b/modules/common/filesystems.nix
@@ -0,0 +1,4 @@
+{ lib, ... }: {
+  fileSystems."/".device = lib.mkDefault "none";
+  # We cannot set up a system without a device on /, but we need to for overriding later
+}