diff --git a/systems/nixbuild.nix b/systems/nixbuild.nix
index 54ec7be..6fef254 100644
--- a/systems/nixbuild.nix
+++ b/systems/nixbuild.nix
@@ -30,14 +30,14 @@
   ];
 
   nix.settings = {
-    /*
-      substituters = [
-        "https://cache.nixos.org"
-        "ssh-ng://harald@m4?ssh-key=/etc/ssh/nix-builder-key"
-        "ssh-ng://harald@rialo?ssh-key=/etc/ssh/nix-builder-key"
-        "ssh-ng://harald@sgx?ssh-key=/etc/ssh/nix-builder-key"
-      ];
-    */
+
+    substituters = [
+      "https://cache.nixos.org"
+      "ssh-ng://harald@m4?ssh-key=/etc/ssh/nix-builder-key"
+      "ssh-ng://harald@rialo?ssh-key=/etc/ssh/nix-builder-key"
+      "ssh-ng://harald@sgx?ssh-key=/etc/ssh/nix-builder-key"
+    ];
+
     builders-use-substitutes = true;
   };