oh, ok i think it should be fixed now in master or tomorrow's nightly but if you want to give it a try you can add:
OS_CODENAME=$(cat /etc/os-release | grep VERSION= | sed "s/VERSION\=\"\(.*\)\"/\1/")
if [ "$OS_CODENAME" = "7 (wheezy)" ]; then
echo "detected wheezy, installing g++4.8 for c++11 compatibility"
apt-get install g++-4.8
at the end of the install_dependencies script