diff --git a/hosts/hardware/FredOS-Gaming.nix b/hosts/hardware/FredOS-Gaming.nix
index 71fd8a1..6e1de8e 100644
--- a/hosts/hardware/FredOS-Gaming.nix
+++ b/hosts/hardware/FredOS-Gaming.nix
@@ -8,14 +8,14 @@
   nixpkgs.overlays = [ inputs.nix-cachyos-kernel.overlays.pinned ];
   boot.kernelPackages = lib.mkForce pkgs.cachyosKernels.linuxPackages-cachyos-bore;
 
+  # garnix.io shut down July 2026; lantian's attic cache still serves the
+  # cachyos kernel builds.
   nix.settings = {
     substituters = [
       "https://attic.xuyh0120.win/lantian"
-      "https://cache.garnix.io"
     ];
     trusted-public-keys = [
       "lantian:EeAUQ+W+6r7EtwnmYjeVwx5kOGEBpjlBfPlzGlTNvHc="
-      "cache.garnix.io:CTFPyKSLcx5RMJKfLo5EEPUObbA78b0YQ2DTCJXqr9g="
     ];
   };