{ ... }: {

  # Binary Cache for Haskell.nix
  nix.settings.trusted-public-keys =
    [ "hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ=" ];
  nix.settings.substituters = [ "https://cache.iog.io" ];

}