How to download pre-built `Steam` from cache?

I’m 1 days old in NixOS.

I’m trying to download Steam But nix building some dependencies from source, and it’s taking over an hour.

I added the following settings (from ChatGPT), And expected Nix to download pre-built binaries from the cache instead of compiling them:

    auto-optimise-store = true;
    fallback = false;
    connect-timeout = 5;
    builders-use-substitutes = true;
    substituters = [
      "https://cache.nixos.org"
      "https://nix-community.cachix.org"
    ];
    trusted-public-keys = [
      "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ1ndhhRE0Gly5lEwQ="
      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
    ];

My configuration.nix File.

What I am missing ?

Steam itself won’t be cached, but for the dependencies, there’s been a recent issue with the infra that will hopefully be resolved soon.