From 6c72f80b4161b6505d2093a5c4b777f5018b2102 Mon Sep 17 00:00:00 2001
From: Julien Moutinho <julm+nixpkgs@sourcephile.fr>
Date: Thu, 15 Jul 2021 18:21:02 +0200
Subject: [PATCH] nixos/sanoid: fix submodule aliases

Use `mkDefault` into `mkAliasDefitinions`.
This avoids conflicting definitions when using `process_children_only`.
---
 nixos/modules/services/backup/sanoid.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/nixos/modules/services/backup/sanoid.nix b/nixos/modules/services/backup/sanoid.nix
index be44a43b6d3f..abc4def1c61f 100644
--- a/nixos/modules/services/backup/sanoid.nix
+++ b/nixos/modules/services/backup/sanoid.nix
@@ -108,8 +108,8 @@ in {
         type = types.attrsOf (types.submodule ({config, options, ...}: {
           freeformType = datasetSettingsType;
           options = commonOptions // datasetOptions;
-          config.use_template = mkAliasDefinitions (options.useTemplate or {});
-          config.process_children_only = mkAliasDefinitions (options.processChildrenOnly or {});
+          config.use_template = mkAliasDefinitions (mkDefault options.useTemplate or {});
+          config.process_children_only = mkAliasDefinitions (mkDefault options.processChildrenOnly or {});
         }));
         default = {};
         description = "Datasets to snapshot.";