diff --git a/flake.nix b/flake.nix
index 6ec46ba..589a663 100644
--- a/flake.nix
+++ b/flake.nix
@@ -83,7 +83,7 @@
       homeManagerModules = import ./modules/home-manager;
 
       overlays = import ./overlays { inherit inputs outputs; };
-      # hydraJobs = import ./hydra.nix { inherit inputs outputs; };
+      # hydraJobs = import ./hydra.nix { inherit inputs outputs; }; # TODO add hydra jobs here?
 
       packages = forEachSystem (pkgs: import ./pkgs { inherit pkgs; });
       devShells = forEachSystem (pkgs: import ./shell.nix { inherit pkgs; });
@@ -135,14 +135,15 @@
       # Add overlays for the `nixpkgs` channel.
       # overlays = with inputs; [
       #   nix-matlab.overlay
-      #   nix-topology.overlays.default
       # ];
 
       # systems.modules.nixos = with inputs; [
       #   sops-nix.nixosModules.sops
       #   disko.nixosModules.disko
+      #   TODO: add sops and disko modules somewhere
       # ];
       # systems.hosts.pianonix.modules = with inputs; [ nixos-hardware.nixosModules.raspberry-pi-4 ];
+      #   TODO: add rpi4 hardware modules
 
       # deploy-rs node configuration
       deploy.nodes = {