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final: prev: {
  ma1sd = let
    pname = "ma1sd";
    version = "2.5.0";
    rev = version;

    src = prev.fetchFromGitHub {
      inherit rev;
      owner = "ma1uta";
      repo = "ma1sd";
      hash = "sha256-K3kaujAhWsRQuTMW3SZOnE7Rmu8+tDXaxpLrb45OI4A=";
    };


    deps = prev.stdenv.mkDerivation {
      pname = "${pname}-deps";
      inherit src version;
      nativeBuildInputs = with final; [ gradle_6 perl git ];

      buildPhase = ''
        export MA1SD_BUILD_VERSION=${rev}
        export GRADLE_USER_HOME=$(mktemp -d);
        gradle --no-daemon build -x test
      '';

      # perl code mavenizes pathes (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-P81aY1rOnZdb2UskPIrBe8dfWAicJ3TivBv/NEns5ro=";
    };
  in prev.stdenv.mkDerivation {
    inherit pname src version;
    nativeBuildInputs = with final; [ gradle_6 perl makeWrapper ];
    buildInputs = with final; [ jre ];

    buildPhase = ''
      runHook preBuild
      export MA1SD_BUILD_VERSION=${rev}
      export GRADLE_USER_HOME=$(mktemp -d)
      sed -ie "s#mavenCentral()#mavenLocal(); maven { url '${deps}' }#g; s#mavenCentral()##g" build.gradle
      gradle --offline --no-daemon build -x test
      runHook postBuild
    '';

    installPhase = ''
      runHook preInstall
      install -D build/libs/source.jar $out/lib/ma1sd.jar
      makeWrapper ${final.jre}/bin/java $out/bin/ma1sd --add-flags "-jar $out/lib/ma1sd.jar"
      runHook postInstall
    '';
  };
}