{stdenv, fetchurl, unicode ? true}:

stdenv.mkDerivation {
  name = "ncurses-5.6";
  src = fetchurl {
    url = mirror://gnu/ncurses/ncurses-5.6.tar.gz;
    md5 = "b6593abe1089d6aab1551c105c9300e3";
  };
  configureFlags="--with-shared --includedir=\${out}/include"+(if unicode then  " --enable-widec " else " ") +" --without-debug";
  preBuild = ''sed -e "s@\([[:space:]]\)sh @\1''${SHELL} @" -i */Makefile Makefile'';
  postInstall= if unicode then "
    chmod -v 644 $out/lib/libncurses++w.a
    for lib in curses ncurses form panel menu; do
      rm -vf $out/lib/lib\${lib}.so
      echo \"INPUT(-l\${lib}w)\" > $out/lib/lib\${lib}.so
      ln -svf lib\${lib}w.a $out/lib/lib\${lib}.a
      ln -svf lib\${lib}w.so.5 $out/lib/lib\${lib}.so.5
    done;
  " else "";
}