Updated packages have been posted at: http://ftp.scientificlinux.org/linux/scientific/6/x86_64/external_products/devtoolset/ We have successfully compiled the Developer Tools suite for SL 6. This includes all compilers and the Eclipse IDE. Due to package changes upstream, the Developer Tools 2.1 components are considered RPM upgrades to 2.0 packages. They cannot be installed in parallel. Upstream documentation at: https://access.redhat.com/site/documentation/en-US/Red_Hat_Developer_Toolset/ Pat