The GNU project is a GSoC org again. Last year Sarthak did a great job working on parameterization of Guix. It works, and you can try the code. See
=> https://guix.gnu.org/blog/2023/parameterized-packages-for-gnu-guix/ => https://blog.lispy.tech/ For this year GNU can propose projects again. We should suggest Guix, Mes and Hurd projects in the coming two weeks. Ping Gábor, Sarthak, Arun, Efraim or me if you are interested in co-mentoring an effort. Note that GSoC is competitive for orgs, mentors and students. It requires effort, but anyone who participates can attest it is rewarding. I have been doing this for more than 10 years. It is a great programme. Pj.