anchor.diff:    passthru = rec {
       majorVersion = "1.9";
       minorVersion = "3";
  -    patchLevel = "194";
  +    patchLevel = "392";
       libPath = "lib/ruby/${majorVersion}";
       gemPath = "lib/ruby/gems/${majorVersion}";
     };
  
positive.code: 
  stdenv.mkDerivation rec {
    version = with passthru; "${majorVersion}.${minorVersion}-p${patchLevel}";
    
    name = "ruby-${version}";
    
    src = fetchurl {
      url = "ftp://ftp.ruby-lang.org/pub/ruby/1.9/${name}.tar.bz2";
      sha256 = "1ymq5lhp3fz0j3cs65521aihcnivbfrn76in900ccxd0msgfmld9";
    };
  
    # Have `configure' avoid `/usr/bin/nroff' in non-chroot builds.
  
negative.code:     ++ (op yamlSupport libyaml);
  
    enableParallelBuilding = true;
  
    configureFlags = ["--enable-shared" "--enable-pthread"];
  
    installFlags = stdenv.lib.optionalString docSupport "install-doc";
  