Hello, I am right now in the process of updating pari-gp to version 2.9.3. After building it on a git check-out of three days ago, which went smoothly, I rebased my patch on today's master and was pleased to see that no rebuild was needed:
$ ./pre-inst-env guix build pari-gp -n outputs nothing. However, once the -n dropped, the gd package gets built. And then it is starting ruby, which has no connection to pari-gp: Downloading https://mirror.hydra.gnu.org/guix/nar/229n3pzp5bdmbdvwslg0dxliysas92k5-ruby-2.4.1.tar.xz... ruby-2.4.1.tar.xz 9.5MiB 22KiB/s 00:06 [ ] 1.3%^ Andreas