Comment # 2 on bug 1221016 from Fabian Vogt

(In reply to Martin Jambor from comment #1)
> FTR, the corresponding Gentoo bug seems to be:
> https://bugs.gentoo.org/919000

Which leads to
https://github.com/Python-SIP/sip/commit/5a3ef73785cda3d916cf8b7459c44c4555a4d47a
- will add a backport.