anchor.diff:  { stdenv, fetchurl, fetchsvn, makeWrapper, which
  +
  +# default dependencies
  +, bzip2, ffmpeg, flac #, harfbuzz
  +, icu, libevent, expat, libjpeg
  +, libpng, libwebp, libxml2, libxslt #, skia
  +, speex, sqlite, openssl #, stlport
  +, v8, xdg_utils, yasm, zlib
  +
   , python, perl, pkgconfig
  -, nspr, nss, udev, bzip2
  +, nspr, udev
   , utillinux, alsaLib
   , gcc, bison, gperf
   , krb5
  
positive.code:     toFlag = key: value: "-D${key}=${sanitize value}";
    in attrs: concatStringsSep " " (attrValues (mapAttrs toFlag attrs));
  
  in stdenv.mkDerivation rec {
    name = "chromium-${version}";
  
  
negative.code:     sha256 = sourceInfo.sha256;
    };
  
    buildInputs = defaultDependencies ++ [
      which makeWrapper
      python perl pkgconfig
      nspr udev
      utillinux alsaLib
      gcc bison gperf
      krb5
  