sources:
  "2.89":
    url: "https://github.com/bulletphysics/bullet3/archive/2.89.tar.gz"
    sha256: "621b36e91c0371933f3c2156db22c083383164881d2a6b84636759dc4cbb0bb8"
  "3.06":
    url: "https://github.com/bulletphysics/bullet3/archive/3.06.tar.gz"
    sha256: "217c1d198ee00be7e40d4cb4d79882e37ef4a06cbfbe11f5fbc207c347a57020"
