diff --git a/flake.nix b/flake.nix
index 3ebc08d..c932d2b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -13,7 +13,7 @@
         kernel = pkgs.linux_latest;
         # TODO pass kernel version to the flake, use overlays maybe
         ethercat = if system == "aarch64-linux" then
-          etherlab.ethercat.override {
+          etherlab.packages.${system}.ethercat.override {
             kernel = pkgs.linuxKernel.kernels.linux_rpi4;
             master_device0 = "end0";
           } else etherlab.packages.${system}.ethercat.override { inherit kernel; };