Good to see love for GNU Guix. I have contributed to a couple of packages upstream and some build code (one of my patches even broke Guix, but thankfully it was rectified in only a few short hours).
The ani-cli
package was authored by me as my first "real" original package to guix. I remember having to argue in the mailing list about the legality of watching anime but gosh darn it there had to be anime on the GNU operating system (my argument was basically that ani-cli was like yt-dlp and the fact that Debian also packages it).
I don't use Guix System personally. Just Guix on top of something stable like POP!_OS and Linux Mint.