This package is a wrapper for the sassc-binary, compiled from hcatlin's source libraries libsass and sassc.
sudo yum-config-manager --enable rhel-server-rhscl-6-rpmss
sudo yum install centos-release-scl
sudo yum install devtoolset-3-gcc devtoolset-3-gcc-c++
CC=/opt/rh/devtoolset-3/root/usr/bin/gcc CXX=/opt/rh/devtoolset-3/root/usr/bin/g++ php build.php