updating GRUB 2 menu...
installing the GRUB 2 boot loader on /dev/sda2...
Installing for i386-pc platform.
/nix/store/c75wg334awrx9l3dr3zrcb96x8qyxhjh-grub-2.02/sbin/grub-install: warning: File system `ext2' doesn't support embedding.
/nix/store/c75wg334awrx9l3dr3zrcb96x8qyxhjh-grub-2.02/sbin/grub-install: warning: Embedding is not possible.  GRUB can only be installed in this setup by using blocklists.  However, blocklists are UNRELIABLE and their use is discouraged..
/nix/store/c75wg334awrx9l3dr3zrcb96x8qyxhjh-grub-2.02/sbin/grub-install: error: will not proceed with blocklists.
/nix/store/hapskyj0ir5mabbckm4ygpmlivmnh853-install-grub.pl: installation of GRUB on /dev/sda2 failed