{stdenv, fetchzip, zip, jikes}: stdenv.mkDerivation rec {
    pname = "gnu-classpath";
    version = "0.93";

    src = fetchzip {
        url = "ftp.gnu.org/gnu/classpath/classpath-${version}.tar.gz";
        hash = "sha256-dP4lmumUKkOlwWOFHncPnsxR2y3Qr6mE+K3eb+x5zbY=";
    };

    patches = [./gnu-classpath_93.patch];

    nativeBuildInputs = [jikes zip];

    env = {
        NIX_CFLAGS_COMPILE="-Wno-calloc-transposed-args -Wno-deprecated-declarations -Wno-unused-result -Wno-stringop-truncation -Wno-cast-function-type";
    };

    configureFlags = ["--disable-gtk-peer" "--disable-gconf-peer" "--disable-plugin"];

    postInstall = ''
        ln -s ${jikes}/bin/jikes $out/bin/jikes
        ln -s $out/bin/jikes $out/bin/javac

        cat << 'EOF' > $out/bin/java
#!/bin/bash
exec jamvm "$@"
EOF
        chmod +x $out/bin/java
    '';
}