diff --git a/flake.nix b/flake.nix
index a68fa84..d1804f4 100755
--- a/flake.nix
+++ b/flake.nix
@@ -1,6 +1,26 @@
 {
   description = "NixOS configs";
 
+  nixConfig = {
+    extra-substituters = [
+      "https://binarycache.k3t.dev"
+      "https://nix-community.cachix.org"
+
+    ];
+    extra-trusted-public-keys = [
+      "binarycache.k3t.dev:cmIg4sWTZ729F1yEF2AYLtSbUXJGFYwM6tzYYF18qts="
+      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+    ];
+    nix.settings = {
+      optimise.automatic = true;
+      gc = {
+        automatic = true;
+        dates = "daily";
+        options = "--delete-older-than 2d";
+      };
+    };
+  };
+
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
     impermanence.url = "github:nix-community/impermanence";
diff --git a/hosts/nixcloud/services.d/nix-serve.nix b/hosts/nixcloud/services.d/nix-serve.nix
index 2cf9909..b0574c5 100644
--- a/hosts/nixcloud/services.d/nix-serve.nix
+++ b/hosts/nixcloud/services.d/nix-serve.nix
@@ -3,4 +3,8 @@
     enable = true;
     secretKeyFile = "/var/cache-priv-key.pem";
   };
+  services.nginx.virtualHosts."binarycache.k3t.dev" = {
+    enableACME = true;
+    locations."/".proxyPass = "http://${config.services.nix-serve.bindAddress}:${toString config.services.nix-serve.port}";
+  };
 }
\ No newline at end of file
diff --git a/modules/sys/hw/cpu/arm64.nix b/modules/sys/hw/cpu/arm64.nix
index b72da9a..70ab179 100644
--- a/modules/sys/hw/cpu/arm64.nix
+++ b/modules/sys/hw/cpu/arm64.nix
@@ -1,4 +1,4 @@
 {
   boot.binfmt.preferStaticEmulators = true;
-  boot.binfmt.emulatedSystems = [ "x86_64-linux" "i386-linux" ];
+  #boot.binfmt.emulatedSystems = [ "x86_64-linux" "i386-linux" ];
 }
\ No newline at end of file
diff --git a/modules/sys/nix.nix b/modules/sys/nix.nix
index fb991ce..137f29c 100644
--- a/modules/sys/nix.nix
+++ b/modules/sys/nix.nix
@@ -8,16 +8,10 @@
         "https://cache.nixos.org/"
       ];
       trusted-public-keys = [
-        "binarycache.k3t.dev:cmIg4sWTZ729F1yEF2AYLtSbUXJGFYwM6tzYYF18qts=#"
+        "binarycache.k3t.dev:cmIg4sWTZ729F1yEF2AYLtSbUXJGFYwM6tzYYF18qts="
         "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
       ];
     };
-    optimise.automatic = true;
-    gc = {
-      automatic = true;
-      dates = "daily";
-      options = "--delete-older-than 2d";
-    };
   };
   nixpkgs.config.allowUnfree = true;
 }
\ No newline at end of file