{
  description = "A minimal flake using builtins.derivation in mkShell";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
  };

  outputs =
    { self, nixpkgs }:
    let
      system = "x86_64-linux";
      pkgs = nixpkgs.legacyPackages.${system};

      binary_data = builtins.derivation {
        name = "binary_data";
        builder = "${pkgs.bash}/bin/bash";
        args = [
          "-c"
          # simulate build binary data file under network
          ''echo -ne '\x01\x02\x03\x04\x05\x06\x07' > $out''
        ];
        inherit system;
        outputHashMode = "flat";
        outputHashAlgo = "sha256";
        outputHash = "32bbe378a25091502b2baf9f7258c19444e7a43ee4593b08030acd790bd66e6a";
      };
    in
    {
      devShells.${system}.default = pkgs.mkShell {
        buildInputs = [ binary_data ];
        shellHook = ''
          echo foo build from --file ${binary_data}
        '';
      };
    };
}