sources:
  cbindgen-vendor.tar.xz: 7efa6255e73d8e3c9dc674822d2e29ebc0e3391b
  firefox-65.0.2.source.tar.xz: b38b5f10faac672656933c1c3537281d449d2785
  firefox-dictionary-61.0.2.tar.bz2: 25929c585dc8568a32d5be49aacc672f0ed2202f