anchor.diff:  { stdenv, fetchurl, xlibs, flex, bison, mesa, alsaLib
   , ncurses, libpng, libjpeg, lcms, freetype, fontconfig, fontforge
  -, libxml2, libxslt, openssl
  +, libxml2, libxslt, openssl, gnutls
   }:
   
   assert stdenv.isLinux;
  
positive.code:     xlibs.libXcursor xlibs.libXinerama xlibs.libXrandr
      xlibs.libXrender xlibs.libXxf86vm xlibs.libXcomposite
      alsaLib ncurses libpng libjpeg lcms fontforge
      libxml2 libxslt openssl
    ];
  
    # Wine locates a lot of libraries dynamically through dlopen().  Add
  
negative.code:     freetype fontconfig stdenv.gcc.gcc mesa mesa.libdrm
      xlibs.libXinerama xlibs.libXrender xlibs.libXrandr
      xlibs.libXcursor xlibs.libXcomposite
      openssl gnutls
    ];
  
    # Don't shrink the ELF RPATHs in order to keep the extra RPATH
  