https://calibre-ebook.com/whats-new Reproducible: Always
Please update calibre to the new version. I can't use it at the moment. When I try to view a book I get the error: "AttributeError:type Object 'QUrL' has no attribute 'None'". I think the problem is fixed with this version.
2.63 was released on 08 Jul. Does anyone maintains that ebuild?
This is in git: https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=9a4ad159cdbeb37c76d40cc0f45b06debcafd6be