Hi Lars,

I've pushed gmsh update after it built succefully on my machine:
--8<---------------cut here---------------start------------->8---
> ./pre-inst-env guix build  gmsh
/gnu/store/p3zgbzgv7gvzj3f2gzfv0b04g7w16dzg-gmsh-4.13.1
--8<---------------cut here---------------end--------------->8---

Pushed to master as 3a916935311568b742d734cf76be8a45737f9382.