The var/guix directory gets installed according to the configuration of the host Guix, instead of the installed Guix (that is, /var).
This means that if someone (like me) configured the host Guix with --prefix=/usr/local, the directory will be installed into /usr/local/var/guix, which won't work, and will cause the installed guix to see an empty /gnu/store. This is dangerous because then, it will try to download glibc, and while doing that, it will delete the existing one in /gnu/store, and kill the operating system. Workarounds: 1. Configure the host guix with --prefix=/ or 2. Once the system is initialized, move the var/guix folder (eg, from /usr/local/var) to /var
