Changelog for devtoolset-9-9.0-1.el6.x86_64.rpm :
Mon Sep 23 14:00:00 2019 Marek Polacek - 9.0.1
- drop setting PYTHONPATH and PERL5LIB (#1749445)

Tue Jun 18 14:00:00 2019 Marek Polacek - 9.0.0
- new package