partition table on guix system

[christophe . pisteur]

Hello,
I am trying to install guix system 1.3 on a lenovo t400 (libreboot) and 
I have a problem with the manual partition table during the 
installation.
I want an encrypted /home on a separate sata drive and the rest on the / 
partition (no encryption). But the installer fails when formatting and I 
don't understand the error message.

Here is the partition table I made:

ATA ... /dev/sda 128 GB msdos
1. normal 8GB linux-swap (v1)
2. normal 120GB ext4 boot/                       -> bootable: yes, 
encrypton: no

ATA .... /dev/sdb 1000GB msdos
1. normal 1000GB ext4 /home crypthome

When I confirm the table, the installer asks me for the key to encrypt, 
then starts to format, then aborts with a error message and starts again 
at the beginning of the installation process.

where is the error I made?

Thanks for your help

Christophe