anchor.diff:    '';
   
     meta = {
  +    description = "A typeface family based on the Bitstream Vera fonts";
  +    longDescription = ''
  +      The DejaVu fonts are TrueType fonts based on the BitStream Vera fonts,
  +      providing more styles and with greater coverage of Unicode.
  +
  +      This package includes DejaVu Sans, DejaVu Serif, DejaVu Sans Mono, and
  +      the TeX Gyre DejaVu Math font.
  +    '';
  +    homepage = http://dejavu-fonts.org/wiki/Main_Page;
  +
  +    # Copyright (c) 2003 by Bitstream, Inc. All Rights Reserved.
  +    # Copyright (c) 2006 by Tavmjong Bah. All Rights Reserved.
  +    # DejaVu changes are in public domain
  +    # See http://dejavu-fonts.org/wiki/License for details
  +    license = stdenv.lib.licenses.free;
  +
       platforms = stdenv.lib.platforms.linux;
     };
   }
  
positive.code:   buildInputs = [fontforge perl FontTTF];
  
    unicodeData = fetchurl {
      url = http://www.unicode.org/Public/6.1.0/ucd/UnicodeData.txt ;
      sha256 = "1bd6zkzvxfnifrn5nh171ywk7q56sgk8gdvdn43z9i53hljjcrih";
    };
    blocks = fetchurl {
      url = http://www.unicode.org/Public/6.1.0/ucd/Blocks.txt;
      sha256 = "0w0vkb09nrlc6mrhqyl9npszdi828afgvhvlb1vs5smjv3h8y3dz";
    };
  
    src = fetchurl {
      url = "mirror://sourceforge/dejavu/dejavu-fonts-${version}.tar.bz2";
      sha256 = "1xdbi4llrq1qbkd73352ibrfqcbz93dww8hab216qz5szd95yvv4";
    };
  
    buildFlags = "full-ttf";
  
negative.code: {fetchurl, fetchFromGitHub, stdenv, fontforge, perl, fontconfig, FontTTF}:
  
  let version = "2.37" ; in
  
  stdenv.mkDerivation rec {
    name = "dejavu-fonts-${version}";
  