diff --git a/modules/nixos/hardware/nvidia.nix b/modules/nixos/hardware/nvidia.nix
index ed9898a..58be28d 100644
--- a/modules/nixos/hardware/nvidia.nix
+++ b/modules/nixos/hardware/nvidia.nix
@@ -20,7 +20,7 @@
       NVD_BACKEND = "direct";
     };
 
-    nix.settings.substituters = [ "cuda-maintainers.cachix.org" ];
+    nix.settings.substituters = [ "https://cuda-maintainers.cachix.org" ];
     nix.settings.trusted-public-keys = [
       "cuda-maintainers.cachix.org-1:0dq3bujKpuEPMCX6U4WylrUDZ9JyUG0VpVZa7CNfq5E="
     ];