anchor.diff:  in
   
   stdenv.mkDerivation rec {
  -  version = "1.8.7-p302";
  +  version = with passthru; "${majorVersion}.${minorVersion}-p${patchLevel}";
     
     name = "ruby-${version}";
     
     src = fetchurl {
       url = "ftp://ftp.ruby-lang.org/pub/ruby/1.8/${name}.tar.gz";
  -    sha256 = "18a4w0n1n0sij7gkb3196dnqav5zr0c5p26f08k7cw6y0i9dz0sq";
  +    sha256 = "0qf50wa1ziziagnxarj8z6yrsivrhchq1j9017ff3z2z7d31l9kc";
     };
   
     # Have `configure' avoid `/usr/bin/nroff' in non-chroot builds.
  
positive.code:     description = "The Ruby language";
    };
  
    passthru = {
      # install ruby libs into "$out/${ruby.libPath}"
      libPath = "lib/ruby-1.8";
    };
  }
  
negative.code:   configureFlags = ["--enable-shared" "--enable-pthread"];
  
    installFlags = stdenv.lib.optionalString docSupport "install-doc";
    # Bundler tries to create this directory
    postInstall = "mkdir -pv $out/${passthru.gemPath}";
  
    meta = {
      license = "Ruby";
  