For several versions of dev-libs/libxslt currently in portage: "QA Notice: USE Flag 'python' not in IUSE for dev-libs/libxslt-1.1.x I just recently updated portage, and hadn't done `emerge metadata`, so I got this while "Calculating world dependencies" under `emerge -Dup world`. Reproducible: Didn't try Steps to Reproduce: 1. 2. 3.
Can't have a conditional inherit on the python eclass, need to change that.
Fixed, thanks for the report.