diff --git a/hosts/gunter/configuration.nix b/hosts/gunter/configuration.nix
index e3dc93d..aa9e062 100644
--- a/hosts/gunter/configuration.nix
+++ b/hosts/gunter/configuration.nix
@@ -119,8 +119,16 @@
   };
 
   # Enable flakes
-  nix.settings.experimental-features = [ "nix-command" "flakes" ];
-  nix.settings.trusted-users = [ "root" "torjus" ];
+  nix.settings = {
+    experimental-features = [ "nix-command" "flakes" ];
+    trusted-users = [ "root" "torjus" ];
+    substituters = [
+      "https://cuda-maintainers.cachix.org"
+    ];
+    trusted-public-keys = [
+      "cuda-maintainers.cachix.org-1:0dq3bujKpuEPMCX6U4WylrUDZ9JyUG0VpVZa7CNfq5E="
+    ];
+  };
 
   nixpkgs.config.allowUnfree = true;
   # Install system-wide packages