Hello Philippe,
I am working to fix it in a larger effort to write a Scalasca recipe (which needs Score-P, which needs Cube...).
I have pushed some new Cube recipes here https://codeberg.org/guix/guix/pulls/102 , and you can find the Scalasca roadmap here https://codeberg.org/lcirrottola/guix/milestone/19626

Feel free to comment / fix / criticize :-)
Cheers,
Luca