Hi ! apparently guile has a problem. After installation of guiXSD 0.12.0 and the started of guixSD the guile display a message :

the message : Entering a new prompt 'bt' or 'q' to continue
GNU Guile 2.0.12
And I do CTRL+D a kernel panic appears.And when I use q or bt nothing working.

It's not a problem with my computer because I installed guixSD 0.12.0 to QEMU but the same problem appear.