install_package "openssl-1.0.2m" "https://www.openssl.org/source/openssl-1.0.2m.tar.gz#8c6ff15ec6b319b50788f42c7abc2890c08ba5a1cdcd3810eb9092deada37b0f" mac_openssl --if has_broken_mac_openssl
install_package "ruby-2.4.0-preview3" "https://cache.ruby-lang.org/pub/ruby/2.4/ruby-2.4.0-preview3.tar.bz2#305a2b2c627990e54965393f6eb1c442eeddfa149128ccdd9f4334e2e00a2a52" ldflags_dirs standard verify_openssl