diff --git a/aux-etc-nixos/configuration.nix b/aux-etc-nixos/configuration.nix
index d5924c63..d420a820 100644
--- a/aux-etc-nixos/configuration.nix
+++ b/aux-etc-nixos/configuration.nix
@@ -206,9 +206,9 @@ in
 
   services.backupdl.enable = true;
 
-  nix.binaryCachePublicKeys = ["nixbld.m-labs.hk-1:5aSRVA5b320xbNvu30tqxVPXpld73bhtOeH6uAjRyHc="];
-  nix.binaryCaches = ["https://nixbld.m-labs.hk" "https://cache.nixos.org"];
-  nix.trustedUsers = ["sb"];
+  nix.settings.trusted-public-keys = ["nixbld.m-labs.hk-1:5aSRVA5b320xbNvu30tqxVPXpld73bhtOeH6uAjRyHc="];
+  nix.settings.substituters = ["https://nixbld.m-labs.hk" "https://cache.nixos.org"];
+  nix.settings.trusted-users = ["sb"];
 
   system.stateVersion = "22.05";
 }