darwin-x64 compilation is broken

[sharkone]

make build-envs PLATFORMS=darwin-x64
...
...
INFO[0088] The command [/bin/sh -c curl -L http://sourceforge.net/projects/boost/files/boost/${BOOST_VERSION}/boost_`echo ${BOOST_VERSION} | sed 's/\\./_/g'`.tar.bz2/download | tar xvj &&     cd boost_`echo ${BOOST_VERSION} | sed 's/\\./_/g'`/ &&     ./bootstrap.sh --prefix=${CROSS_ROOT} &&     echo "using clang : darwin : ${CROSS_TRIPLE}-c++ ;" > ${HOME}/user-config.jam &&     ./b2 --with-date_time --with-system --prefix=${CROSS_ROOT} toolset=clang-darwin link=static variant=release threading=multi target-os=darwin install &&     ${CROSS_TRIPLE}-ranlib ${CROSS_ROOT}/lib/*.a &&     rm -rf ${HOME}/user-config.jam &&     rm -rf `pwd`] returned a non-zero code: 1 
make: *** [build-envs] Error 1

See steeve/cross-compiler#1