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{ stdenv, fetchurl, unzip, flex, tk, ncurses, readline }:

stdenv.mkDerivation {
  pname = "lc3tools";
  version = "0.12";

  src = fetchurl {
    url = "https://highered.mheducation.com/sites/dl/free/0072467509/104652/lc3tools_v12.zip";
    hash = "sha256-PTM0ole8pHiJmUaahjPwcBQY8/hVVgQhADZ4bSABt3I=";
  };

  patches = [
    # the original configure looks for things in the FHS path
    # I have modified it to take environment vars
    ./0001-mangle-configure.patch
  ];

  nativeBuildInputs = [ unzip ];
  buildInputs = [ flex tk ncurses readline ];

  # lumetta published this a while ago but handrolled his configure
  # jank in the original packaging makes this necessary:
  LIBS = "${flex}/lib:${ncurses}/lib:${readline}/lib";
  INCLUDES = "${flex}/include:${ncurses}/include:${readline}/include";

  # it doesn't take `--prefix`
  prefixKey = "--installdir ";

  postInstall = ''
    rm $out/{COPYING,NO_WARRANTY,README}
    mkdir -p $out/{bin,share/lc3tools}

    mv -t $out/share/lc3tools $out/lc3os*
    mv -t $out/bin $out/lc3*
  '';

  meta = with stdenv.lib; {
    description = "Toolchain and emulator for the LC-3 architecture";
    license = licenses.gpl2;
    maintainers = with maintainers; [ anna328p ];
  };
}