{stdenv, fetchzip, ant_1_6, gnu-classpath_93, jamvm_1_5_1, jikes}: stdenv.mkDerivation rec {
    pname = "ecj";
    version = "3.2.1"; #Compiler meldet 3.2.1 bei 3.2.2 source

    src = fetchzip {
        url = "https://archive.eclipse.org/eclipse/downloads/drops/R-3.2.2-200702121330/eclipse-sourceBuild-srcIncluded-3.2.2.zip";
        hash = "sha256-7FYd+SHyJ9FPYBRJIgHW5IgKbF8HhlKMlSXE8oeyuZk=";
        stripRoot=false;
    };

    nativeBuildInputs = [ant_1_6 jamvm_1_5_1 jikes];

    env = {
        JAVA_HOME="${gnu-classpath_93}";
        CLASSPATH="${gnu-classpath_93}/share/classpath/glibj.zip";
        ANT_OPTS="-Dbuild.compiler=jikes";
    };

    buildPhase = ''
        cd jdtcoresrc
        ant -f compilejdtcorewithjavac.xml
        cd ..
    '';

    installPhase = ''
        mkdir -p $out/bin
        cp -r ./jdtcoresrc/ecj.jar $out/bin/ecj.jar
                cat << 'EOF' > $out/bin/ecj
#!/bin/bash
exec ${jamvm_1_5_1}/bin/jamvm -Xmx768M -cp $out/bin/ecj.jar org.eclipse.jdt.internal.compiler.batch.Main "$@"
EOF
        sed -i "s|\$out|$out|g" $out/bin/ecj
        chmod +x $out/bin/ecj
    '';
}