anchor.diff:  
     src = fetchurl rec {
       url = "http://ftp.fox-toolkit.org/pub/${name}.tar.gz";
  -    sha1Url = url + ".sha1sum";
  -    sha256 = "41a03ff6a211c584e7547004002a1cfc768cdc32c84a46ec1499a4c345190885";
  +    #sha1Url = url + ".sha1sum";
  +    sha256 = "15a99792965d933a4936e48b671c039657546bdec6a318c223ab1131624403d1";
     };
   
     buildInputs = [
  
positive.code:   configureFlags = [
      "--disable-debug"
      "--enable-release"
      "--disable-native"
      (enFlag "jpeg" (libjpeg != null) null)
      #(enFlag "jp2" (openjpeg != null) null)
      (enFlag "png" (libpng != null) null)
  
negative.code:     (wtFlag "xfixes" (xorg != null) null)
      (wtFlag "xinput" (xorg != null) null)
      (wtFlag "xim" (xorg != null) null)
      (wtFlag "opengl" (mesa != null) null)
    ];
  
    doCheck = true;
  