this derivation will be built:
  /nix/store/9v81b78cdzjdjcbl8qsy2v1vjryhv9jn-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/9v81b78cdzjdjcbl8qsy2v1vjryhv9jn-bcachefs-module-7.0.0-39-generic.drv'...