these 5 derivations will be built:
  /nix/store/27vww8jfr2d4m0gl9nd154ywizm0svfd-efi-directory.drv
  /nix/store/2xjg67114yqfaazp4s0m81nqfcnwbnqv-closure-info.drv
  /nix/store/jn0k9xb1q4pxs9jybmqgifba9v68z4cn-isolinux.cfg.drv
  /nix/store/mc0yg4cb56p2vd0z697gr3h082c38r9s-efi-image_eltorito.drv
  /nix/store/jvhrfzr06syz2d65fzsfw38cpp3pw9lb-spaces-os.iso.drv