{
  description = "socialize web page";
  inputs.flake-utils.url = "github:numtide/flake-utils";
  outputs = { self, nixpkgs, flake-utils }:
    flake-utils.lib.eachDefaultSystem
      (system:
        let
          pkgs = nixpkgs.legacyPackages.${system};
        in
        {
          packages.socialize =
            pkgs.stdenv.mkDerivation {
              name = "socialize";
              src = self;
              installPhase = ''
                install -m 444 -D index.html $out/index.html
              '';
            };
          defaultPackage = self.packages.${system}.socialize;
        }
      );
}