anchor.diff:      pango
       qt4
       stdenv.cc.cc
  +    udev
       xlibs.libX11
       xlibs.libXcomposite
       xlibs.libXdamage
  
positive.code:   name = "spotify-${version}";
  
    src =
      if stdenv.system == "i686-linux" then
        fetchurl {
          url = "http://repository.spotify.com/pool/non-free/s/spotify/spotify-client_${version}-1_i386.deb";
          sha256 = "1wl6v5x8vm74h5lxp8fhvmih8l122aadsf1qxvpk0k3y6mbx0ifa";
        }
      else if stdenv.system == "x86_64-linux" then
        fetchurl {
          url = "http://repository.spotify.com/pool/non-free/s/spotify/spotify-client_${version}-1_amd64.deb";
          sha256 = "0x87q7gd2997sgppsm4lmdiz1cm11x5vnd5c34nqb5d4ry5qfyki";
        }
      else throw "Spotify not supported on this platform.";
  
    buildInputs = [ dpkg makeWrapper ];
  
  
negative.code:       # Work around Spotify referring to a specific minor version of
        # OpenSSL.
  
        ln -s ${openssl}/lib/libssl.so $libdir/libssl.so.1.0.0
        ln -s ${openssl}/lib/libcrypto.so $libdir/libcrypto.so.1.0.0
        ln -s ${nspr}/lib/libnspr4.so $libdir/libnspr4.so
        ln -s ${nspr}/lib/libplc4.so $libdir/libplc4.so
  
        mkdir -p $out/bin
  
  