removed_sources:
  calibre-0.9.18.tar.xz: c427317986848079fb9156d7289cedb0d2504fa0
  calibre-1.33.0.tar.xz: f4dd3f5063b0680ad93b99eed65a3551c64c53a4
sources:
  calibre-1.34.0.tar.xz: a2ef6b56f3a2a64cf8c5edd5d5becdeae1eae290