("impureEnvVars","http_proxy https_proxy LC_ALL LC_MESSAGES LANG COLUMNS")
("preferLocalBuild","1")
("url","("mirror://sourceforge/expat/expat/2.2.6/expat-2.2.6.tar.bz2" "https://github.com/libexpat/libexpat/releases/download/R_2_2_6/expat-2.2.6.tar.bz2")")
]