{
  nix = {
    settings = {
      substituters = [
        "https://cosmic.cachix.org"
      ];
      trusted-public-keys = [
        "cosmic.cachix.org-1:Dya9IyXD4xdBehWjrkPv6rtxpmMdRel02smYzA85dPE="
      ];
    };
  };
}