anchor.diff:    preConfigure = ''
       export PKG_CONFIG_LIBDIR="$out/lib/pkgconfig"
       mkdir -p "$PKG_CONFIG_LIBDIR"
  -  '' + stdenv.lib.optionalString stdenv.isCygwin ''
  +  '' + lib.optionalString stdenv.isCygwin ''
       sed -i -e 's,LIB_SUFFIX="t,LIB_SUFFIX=",' configure
     '';
   
  
positive.code: 
      homepage = http://www.gnu.org/software/ncurses/;
  
      license = licenses.mit;
      platforms = platforms.all;
      maintainers = with maintainers; [ wkennington ];
    };
  
    passthru.ldflags = if unicode then "-lncursesw" else "-lncurses";
  
negative.code: { lib, stdenv, fetchurl
  
  , mouseSupport ? false
  , unicode ? true
  
  , gpm
  
  # Extra Options
  , abiVersion ? "5"
  }:
  
  stdenv.mkDerivation rec {
    name = "ncurses-5.9";
  
  