anchor.diff: -{ lib, fetchFromGitHub, python3Packages, ffmpeg }:
  +{ lib
  +, fetchFromGitHub
  +, python3Packages
  +, ffmpeg
  +}:
   
   python3Packages.buildPythonApplication rec {
     pname = "gphotos-sync";
  
positive.code: 
    meta = with lib; {
      description = "Google Photos and Albums backup with Google Photos Library API";
      homepage    = "https://github.com/gilesknap/gphotos-sync";
      license     = licenses.mit;
      maintainers = with maintainers; [ dnr ];
    };
  }
  
negative.code:     exif
      psutil
      pyyaml
      requests-oauthlib
    ];
  
    buildInputs = [
      ffmpeg
    ];
  
    checkInputs = with python3Packages; [
      pytestCheckHook
  