{
  lib,
  rustPlatform,
}: let
  fs = lib.fileset;

  lockfile = ../Cargo.lock;
  cargoToml = ../Cargo.toml;
in
  rustPlatform.buildRustPackage {
    pname = "eris";
    version = "0.0.1";

    src = let
      s = ../.;
    in
      fs.toSource {
        root = s;
        fileset = fs.unions [
          (fs.fileFilter (file: builtins.any file.hasExt ["rs"]) s + /src)
          lockfile
          cargoToml
        ];
      };

    postInstall = ''
      mkdir -p $out/share
      install -Dm755 ${../contrib} $out/share/contrib
    '';

    cargoLock.lockFile = lockfile;

    meta = {
      description = "Sophisticated HTTP tarpit and honeypot stream";
      mainProgram = "eris";
    };
  }