anchor.diff:        if    debug then "32bit_debug"
         else             "32bit"
       else throw "Flash Player is not supported on this platform";
  +
  +  suffix =
  +    if      stdenv.system == "x86_64-linux" then
  +      if    debug then throw "no x86_64 debugging version available"
  +      else             "-release.x86_64"
  +    else if stdenv.system == "i686-linux"   then
  +      if    debug then "_linux_debug.i386"
  +      else             "_linux.i386"
  +    else throw "Flash Player is not supported on this platform";
  +
   in
   stdenv.mkDerivation rec {
     name = "flashplayer-${version}";
  
positive.code:     homepage = http://www.adobe.com/products/flashplayer/;
      license = stdenv.lib.licenses.unfree;
      maintainers = [];
    };
  }
  
negative.code: 
    postUnpack = ''
      cd */*${arch}
      tar -xvzf *${suffix}.tar.gz
    '';
  
    sourceRoot = ".";
  