[EPEL-devel] Using devtoolset for EPEL builds

Hi, I need/want/would like to build new node 6 for EL6, but gcc is too old. For that reason, I'd like to use devtoolset-4-gcc, but the build fails (obviously) because the package doesn't exist. So, is there a way to make that work somehow? I am not sure about enabling external repos during build, maybe someone will be wiser. Here's the build: http://koji.fedoraproject.org/koji/taskinfo?taskID=15970697 Zuzka