("impureEnvVars","http_proxy https_proxy LC_ALL LC_MESSAGES LANG COLUMNS")
("preferLocalBuild","1")
("url","("mirror://sourceforge/boost/boost/1.70.0/boost_1_70_0.tar.bz2" "https://dl.bintray.com/boostorg/release/1.70.0/source/boost_1_70_0.tar.bz2")")
]