FYI, someone else is already workin on upgrading Texlive to 2021 on the ‘core-updates’ branch (Texlive is already at 2020 on core-updates).
<https://issues.guix.gnu.org/49408> Maybe you would be interested in helping out?
- Use of %texlive-revision and %texlive-tag in tex... Nathan Benedetto Proença
- Re: Use of %texlive-revision and %texlive-t... Xinglu Chen
- Re: Use of %texlive-revision and %texli... Thiago Jung Bauermann
- Re: Use of %texlive-revision and %t... Nathan Benedetto Proença
- Re: Use of %texlive-revision and %texlive-t... Bengt Richter
- Re: Use of %texlive-revision and %texli... Nathan Benedetto Proença
- Re: Use of %texlive-revision and %t... Bengt Richter
