{
  nix = {
    settings = {
      substituters = [
        "https://cobray.cachix.org"
      ];
      trusted-public-keys = [
        "cobray.cachix.org-1:6ZmcK5aWb30lKS4VkEkPV2YkMv8yXYu5eQjY9D6r8kk="
      ];
    };
  };
}