{
  stdenv,
  fetchFromGitHub,
  gradle,
  jdk,
  perl,
}: let
  meta = builtins.fromJSON (builtins.readFile ../meta.json);
in
  stdenv.mkDerivation {
    pname = "piped-backend-deps";
    version = "latest-${meta.backend.rev}";

    src = fetchFromGitHub {
      owner = "TeamPiped";
      repo = "Piped-Backend";
      rev = "${meta.backend.rev}";
      sha256 = "${meta.backend.sha256}";
    };

    nativeBuildInputs = [gradle jdk perl];

    buildPhase = ''
      export GRADLE_USER_HOME=$(mktemp -d);
      gradle --no-daemon assemble shadowJar
    '';

    # perl code mavenizes paths (com.squareup.okio/okio/1.13.0/a9283170b7305c8d92d25aff02a6ab7e45d06cbe/okio-1.13.0.jar -> com/squareup/okio/okio/1.13.0/okio-1.13.0.jar)
    installPhase = ''
      find $GRADLE_USER_HOME/caches/modules-2 -type f -regex '.*\.\(jar\|pom\)' \
        | perl -pe 's#(.*/([^/]+)/([^/]+)/([^/]+)/[0-9a-f]{30,40}/([^/\s]+))$# ($x = $2) =~ tr|\.|/|; "install -Dm444 $1 \$out/$x/$3/$4/$5" #e' \
        | sh
    '';

    dontStrip = true;

    outputHashAlgo = "sha256";
    outputHashMode = "recursive";
    outputHash = "sha256-tWqnFIb+SvnG7ZH7BNRXCR6RaTGRG/1pXBM1UVr/TOA=";
  }