anchor.diff:  { stdenv
   , fetchurl
  +, lib
   
   , freetype
   , fontconfig
  -, xorg
  +, libx11
  +, libxft
  +, libxinerama
  +, libxrender
  +, xorgproto
   , zlib
   }:
   
  
positive.code:       -e "s,PREFIX = /usr/local,PREFIX = $out,g"
    '';
  
    meta = with stdenv.lib; {
      description = "Dynamic menu for X";
      homepage = http://tools.suckless.org/dmenu;
      license = licenses.mit;
  
negative.code:   buildInputs = [
      freetype
      fontconfig
      libx11
      libxft
      libxinerama
      libxrender
      xorgproto
      zlib
    ];
  
  