Using build instructions from repo make build fails while building images for centos6.
From the error it looks like the ftp link, which dockerfile uses to upgrade gcc etc. no longer exists.
curl: (22) The requested URL returned error: 404 Not Found
error: http:The command '/bin/sh -c wget -O /etc/yum.repos.d/slc6-devtoolset.repo http: returned a non-zero code: 1
make: *** [build-hawq-dev-centos6] Error 1
make: *** [build] Error 2