these 5 derivations will be built:
  /nix/store/5921b9bfga877hgxqwplc6hijip7vdiz-isolinux.cfg.drv
  /nix/store/91bg6zb8w1jx49m8ijf0z4r6k4xdihx8-efi-directory.drv
  /nix/store/cwg65hbmmpn4hw9f8pyrxhsmxrrsyr8r-efi-image_eltorito.drv
  /nix/store/lisdw62gr0gj6hqb2zvv448fjsg4yi21-closure-info.drv
  /nix/store/rknk8a5sdb7qp2xqd5hbq4gc730dwh0f-spaces-os.iso.drv