install_package "openssl-1.0.2o" "https://www.openssl.org/source/openssl-1.0.2o.tar.gz#ec3f5c9714ba0fd45cb4e087301eb1336c317e0d20b575a125050470e8089e4d" 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