diff --git a/flake.nix b/flake.nix
index 2c2e855..dd2b267 100644
--- a/flake.nix
+++ b/flake.nix
@@ -106,5 +106,14 @@
       nixosConfigurations = helper.buildHosts self.nixosConfigurations;
       iso = self.nixosConfigurations._iso.config.system.build.isoImage;
     };
+
+    nixConfig = {
+      extra-substituters = [
+        "https://nix-cache.clerie.de"
+      ];
+      extra-trusted-public-keys = [
+        "nix-cache.clerie.de:bAt1GJTS9BOTcXFWj3nURrSlcjqikCev9yDvqArMP5g="
+      ];
+    };
   };
 }