diff --git a/default.nix b/default.nix
index ff71777..0699718 100644
--- a/default.nix
+++ b/default.nix
@@ -48,9 +48,6 @@ let
     environment.systemPackages = [ autoInstall pkgs.git ];
     documentation.info.enable = false; # https://github.com/NixOS/nixpkgs/issues/124215
     documentation.man.enable = false;
-    # nix.settings.extra-sandbox-paths = [ "/bin/sh=${pkgs.bash}/bin/sh" ];
-    # services.udev.packages = [ pkgs.bash ];
-    # services.udev.path = [ pkgs.bash ];
     nix.settings.trusted-public-keys = ["nixbld.m-labs.hk-1:5aSRVA5b320xbNvu30tqxVPXpld73bhtOeH6uAjRyHc="];
     nix.settings.substituters = ["https://nixbld.m-labs.hk"];
   };