{
  nix = {
    settings.substituters = [
      "https://srid.cachix.org"
    ];
    settings.trusted-public-keys = [
      "srid.cachix.org-1:MTQ6ksbfz3LBMmjyPh0PLmos+1x+CdtJxA/J2W+PQxI="
    ];
  };
}