diff --git a/deployment/data-model.nix b/deployment/data-model.nix
index 3ab0550e..ab466b80 100644
--- a/deployment/data-model.nix
+++ b/deployment/data-model.nix
@@ -135,7 +135,7 @@ in
             };
             deployment = mkOption {
               description = "Generate a deployment from a configuration";
-              type = functionTo environment.config.resource-mapping.output-type;
+              type = functionTo (submodule environment.config.resource-mapping.output-type);
               readOnly = true;
               default =
                 cfg: