dev-python/xcffib can be bumped to 0.5.1 https://github.com/tych0/xcffib/releases Current version in tree is 0.4.2. x11-wm/qtile 0.10.7 will require xcffib >= 0.5.0 https://github.com/qtile/qtile/blob/v0.10.7/setup.py#L100
Added to the tree.