diff --git a/systems/nixbuild.nix b/systems/nixbuild.nix
index 59e0443..fd92e53 100644
--- a/systems/nixbuild.nix
+++ b/systems/nixbuild.nix
@@ -29,16 +29,6 @@
     }
   ];
 
-  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"
-    ];
-    builders-use-substitutes = true;
-  };
-
   # Ensure Nix is in PATH for SSH sessions
   programs.fish.shellInit = ''
     set -gx PATH /nix/var/nix/profiles/default/bin $PATH