user@host ~$ sudo guix system reconfigure /etc/config.scm
The following derivation will be built:
   /gnu/store/sqj0jnif08jvbzb48jpdjwggymcjzl2q-grub.cfg.drv

building /gnu/store/sqj0jnif08jvbzb48jpdjwggymcjzl2q-grub.cfg.drv...
/gnu/store/5c6v18yrx65pnzacs1biqy7pzlfi6rsf-system
/gnu/store/kmdr3c6y3hbf0zm4gxmnzlsf5j907r6c-grub.cfg

activating system...
making '/gnu/store/5c6v18yrx65pnzacs1biqy7pzlfi6rsf-system' the current system...
setting up setuid programs in '/run/setuid-programs'...
populating /etc from /gnu/store/rcf9bsdlc2dr297ydf3l86ibilsrfqky-etc...
The following derivation will be built:
   /gnu/store/lam5sjwwznx8f3mssiwfsa7cvldyccxr-install-bootloader.scm.drv

building /gnu/store/lam5sjwwznx8f3mssiwfsa7cvldyccxr-install-bootloader.scm.drv...
guix system: bootloader successfully installed on '/dev/xvda'
shepherd: Service host-name has been started.
shepherd: Service user-homes has been started.
shepherd: Service sysctl has been started.
shepherd: Service host-name has been started.
shepherd: Service term-auto could not be started.
To complete the upgrade, run 'herd restart SERVICE' to stop,
upgrade, and restart each service that was not automatically restarted.
Run 'herd status' to view the list of services on your system.
user@host ~$ herd restart term-auto
error: connect: /run/user/1000/shepherd/socket: No such file or directory
user@host ~$ herd status
error: connect: /run/user/1000/shepherd/socket: No such file or directory