diff --git a/flake.nix b/flake.nix
index 4602b91d..f03a9a7d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -6,6 +6,9 @@
       nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05";
       home-manager.url = "github:nix-community/home-manager/release-23.05";
       home-manager.inputs.nixpkgs.follows = "nixpkgs";
+      # TODO(sako):: add agenix or sops-nix
+      # https://github.com/ryantm/agenix#install-via-flakes
+      # https://github.com/Mic92/sops-nix
   };
 
   outputs = { self, nixpkgs, home-manager, ...}@inputs: