/nix/store/4ps8pa311972zw8k9c7z21w04qhwpr8j-grub-2.12/sbin/grub-install: warning: this GPT partition label contains no BIOS Boot Partition; embedding won't be possible.
/nix/store/4ps8pa311972zw8k9c7z21w04qhwpr8j-grub-2.12/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/4ps8pa311972zw8k9c7z21w04qhwpr8j-grub-2.12/sbin/grub-install: error: will not proceed with blocklists.
/nix/store/dhn57d6hqajp0j77l33alsqwvv54kv5a-install-grub.pl: installation of GRUB on /dev/sda failed: No such file or directory
Failed to install bootloader