{
  nix = {
    binaryCaches = [ "https://hie-nix.cachix.org" ];
    binaryCachePublicKeys =
      [ "hie-nix.cachix.org-1:EjBSHzF6VmDnzqlldGXbi0RM3HdjfTU3yDRi9Pd0jTY=" ];
  };
}