these 5 derivations will be built:
  /nix/store/0h0cb7xqi6mwc9x2h0pyrawfz3n2p87i-efi-directory.drv
  /nix/store/8wwzclszbiq7c9wgwp5pkr8yq53ylcil-closure-info.drv
  /nix/store/955m53jqg940v402s9sc6lmlng087b5a-isolinux.cfg.drv
  /nix/store/f6xw423q3blp3wvbgh4xyl7xi0pdfac8-efi-image_eltorito.drv
  /nix/store/d25f2kyrd6gx4d6girm884gxz8v0x3s7-spaces-os.iso.drv