SHA512 (ffi-1.15.4.gem) = d8651df16f86250d887e9a9471a45c83f2687596ebfacf8b0471d404cb471fe3da5d6ba781884a7dd97b463fc393500265bb21b6b7afe5b8f70f7e90dc4537e3
SHA512 (ffi-1.15.4-spec.txz) = efd5ee01daf6740b636f8dd7b1ff101814f5300814533315b5dc8ac6b0554750d9a5d6e5c0d152d5855a7dcf9fd5cad0e950e36cc1d6d9b5ba1f4efffb6ae4d3