diff --git a/homes/x86_64-linux/harald@sgx-azure/default.nix b/homes/x86_64-linux/harald@sgx-azure/default.nix
index 425072c..e01b032 100644
--- a/homes/x86_64-linux/harald@sgx-azure/default.nix
+++ b/homes/x86_64-linux/harald@sgx-azure/default.nix
@@ -12,6 +12,14 @@
     sessionPath = [ "$HOME/bin" ];
   };
 
+  nix.settings = {
+    substituters = [ "https://cache.nixos.org" "https://nixsgx.cachix.org" ];
+    trusted-public-keys = [
+      "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
+      "nixsgx.cachix.org-1:tGi36DlY2joNsIXOlGnSgWW0+E094V6hW0umQRo/KoE="
+    ];
+  };
+
   plusultra = {
     cli-apps = {
       bash.enable = true;