040000 tree 6aecf9e2ccea7a61fe1b0637d4d85e3eb32fdac6	bootstrap
040000 tree 7a2cb9bb4bf32fd3dc55843a7b2c77b86450a368	darwin-x86
040000 tree 90ef828abf26b51a9621f973e91defe55de80323	linux-x86