anchor.diff: -{ lib
  -, stdenv
  +{ stdenv
   , autoconf
   , automake
  -, bash
  -, bashInteractive
   , c-ares
   , cryptopp
   , curl
   , doxygen
   , fetchFromGitHub
  +, ffmpeg
   , hicolor-icon-theme
   , libmediainfo
   , libraw
  
positive.code: , libuv
  , libzen
  , lsb-release
  , makeDesktopItem
  , pkgconfig
  , qt5
  , sqlite
  , swig
  , unzip
  , wget
  , enableFFmpeg   ? true, ffmpeg  ? ffmpeg
  }:
  
  assert enableFFmpeg   -> ffmpeg != null;
  
  stdenv.mkDerivation rec {
    name = "megasync-${version}";
  
negative.code:     rev = "v${version}_Linux";
      sha256 = "0lc228q3s9xp78dxjn22g6anqlsy1hi7a6yfs4q3l6gyfc3qcxl2";
      fetchSubmodules = true;
    };
  
    nativeBuildInputs = [
  