{
  lib,
  stdenvNoCC,
  bun,
  fetchFromGitHub,
  makeBinaryWrapper,
  models-dev,
  ripgrep,
  sysctl,
  installShellFiles,
  versionCheckHook,
  writableTmpDirAsHomeHook,
}:
let
  pname = "opencode";
  version = "1.2.27";

  src = fetchFromGitHub {
    owner = "anomalyco";
    repo = "opencode";
    tag = "v${version}";
    hash = "sha256-smGIc6lYWSjfmGAikoYpP7GbB6mWacrPWrRtp/+HJ3E=";
  };
  nodeModulesHashes = {
    x86_64-linux = "sha256-4kjoJ06VNvHltPHfzQRBG0bC6R39jao10ffGzrNZ230=";
    aarch64-linux = "sha256-6Uio+S2rcyBWbBEeOZb9N1CCKgkbKi68lOIKi3Ws/pQ=";
    aarch64-darwin = "sha256-8ngN5KVN4vhdsk0QJ11BGgSVBrcaEbwSj23c77HBpgs=";
    x86_64-darwin = "sha256-v/ueYGb9a0Nymzy+mkO4uQr78DAuJnES1qOT0onFgnQ=";
  };

  platform = stdenvNoCC.hostPlatform;
  bunCpu = if platform.isAarch64 then "arm64" else "x64";
  bunOs = if platform.isLinux then "linux" else "darwin";

  node_modules = stdenvNoCC.mkDerivation {
    pname = "${pname}-node_modules";
    inherit version src;

    impureEnvVars = lib.fetchers.proxyImpureEnvVars ++ [
      "GIT_PROXY_COMMAND"
      "SOCKS_SERVER"
    ];

    nativeBuildInputs = [
      bun
      writableTmpDirAsHomeHook
    ];

    dontConfigure = true;

    buildPhase = ''
      runHook preBuild

      export BUN_INSTALL_CACHE_DIR=$(mktemp -d)

      bun install \
        --cpu="${bunCpu}" \
        --os="${bunOs}" \
        --filter '!./' \
        --filter './packages/opencode' \
        --filter './packages/desktop' \
        --frozen-lockfile \
        --ignore-scripts \
        --no-progress

      bun --bun ${src}/nix/scripts/canonicalize-node-modules.ts
      bun --bun ${src}/nix/scripts/normalize-bun-binaries.ts

      runHook postBuild
    '';

    installPhase = ''
      runHook preInstall

      mkdir -p $out
      find . -type d -name node_modules -exec cp -R --parents {} $out \;

      runHook postInstall
    '';

    dontFixup = true;
    outputHashAlgo = "sha256";
    outputHashMode = "recursive";
    outputHash = nodeModulesHashes.${platform.system};
  };
in
stdenvNoCC.mkDerivation (finalAttrs: {
  inherit
    pname
    version
    src
    node_modules
    ;

  nativeBuildInputs = [
    bun
    installShellFiles
    makeBinaryWrapper
    models-dev
    writableTmpDirAsHomeHook
  ];

  postPatch = ''
    substituteInPlace packages/script/src/index.ts \
      --replace-fail 'throw new Error(`This script requires bun@''${expectedBunVersionRange}' \
                     'console.warn(`Warning: This script requires bun@''${expectedBunVersionRange}'
  '';

  configurePhase = ''
    runHook preConfigure

    cp -R ${finalAttrs.node_modules}/. .

    runHook postConfigure
  '';

  env.MODELS_DEV_API_JSON = "${models-dev}/dist/_api.json";
  env.OPENCODE_DISABLE_MODELS_FETCH = true;
  env.OPENCODE_VERSION = finalAttrs.version;
  env.OPENCODE_CHANNEL = "stable";

  buildPhase = ''
    runHook preBuild

    cd ./packages/opencode
    bun --bun ./script/build.ts --single --skip-install
    bun --bun ./script/schema.ts schema.json

    runHook postBuild
  '';

  installPhase = ''
    runHook preInstall

    install -Dm755 dist/opencode-*/bin/opencode $out/bin/opencode
    install -Dm644 schema.json $out/share/opencode/schema.json

    wrapProgram $out/bin/opencode \
      --prefix PATH : ${
        lib.makeBinPath (
          [
            ripgrep
          ]
          ++ lib.optional platform.isDarwin sysctl
        )
      }

    runHook postInstall
  '';

  postInstall = lib.optionalString (stdenvNoCC.buildPlatform.canExecute platform) ''
    installShellCompletion --cmd opencode \
      --bash <($out/bin/opencode completion) \
      --zsh <(SHELL=/bin/zsh $out/bin/opencode completion)
  '';

  nativeInstallCheckInputs = [
    versionCheckHook
    writableTmpDirAsHomeHook
  ];
  doInstallCheck = true;
  versionCheckKeepEnvironment = [
    "HOME"
    "OPENCODE_DISABLE_MODELS_FETCH"
  ];
  versionCheckProgramArg = "--version";

  passthru = {
    jsonschema = "${placeholder "out"}/share/opencode/schema.json";
  };

  meta = {
    description = "The open source coding agent";
    homepage = "https://opencode.ai/";
    license = lib.licenses.mit;
    mainProgram = "opencode";
    platforms = builtins.attrNames nodeModulesHashes;
  };
})