Hi Fanis,
> The other example is Qbittorrent. > its GPL-2 again in gentoo: > https://packages.gentoo.org/packages/net-p2p/qbittorrent > <https://packages.gentoo.org/packages/net-p2p/qbittorrent> > Source is saying GPL-2: > https://github.com/qbittorrent/qBittorrent/blob/master/COPYING > <https://github.com/qbittorrent/qBittorrent/blob/master/COPYING> > but Guix is saying GPL-2+ again. It is correct that the repository contains a copy of the text of version 2 of the GPL in COPYING. The source files, however, have a license header that states that version 2 of the license or any later version applies. See for example https://github.com/qbittorrent/qBittorrent/blob/master/src/base/asyncfilestorage.cpp -- Ricardo