diff --git a/config/default.nix b/config/default.nix
index 60e64c88..d63613d8 100644
--- a/config/default.nix
+++ b/config/default.nix
@@ -110,10 +110,8 @@
     ];
     registry.nixpkgs.flake = nixos;
     settings = {
-      builders-use-substitutes = true; # TODO: move
-      connect-timeout = 20;
-      experimental-features = "nix-command flakes";
-      fallback = true;
+      # if a download from hydra fails, we want to stop and retry it, instead of building it
+      fallback = false;
       trusted-public-keys = [
         "nix-cache.hq.c3d2.de:KZRGGnwOYzys6pxgM8jlur36RmkJQ/y8y62e52fj1ps="
       ];