Guix can be extended with channels, and so there are channels like nonguix (for nonfree software) or guix-science (for software that's too messy to include in G

Guix can be extended with channels, and so there are channels like nonguix (for nonfree software) or guix-science (for software that's too messy to include in Guix proper) that go beyond what quality control keeps out of Guix proper.