diff --git a/flake.nix b/flake.nix
index 417885d..3ebc08d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -11,6 +11,7 @@
       let
         pkgs = nixpkgs.legacyPackages.${system};
         kernel = pkgs.linux_latest;
+        # TODO pass kernel version to the flake, use overlays maybe
         ethercat = if system == "aarch64-linux" then
           etherlab.ethercat.override {
             kernel = pkgs.linuxKernel.kernels.linux_rpi4;