this derivation will be built:
  /nix/store/724mvr2j26zv2bhjv6zx9wmqkxb61sq7-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/724mvr2j26zv2bhjv6zx9wmqkxb61sq7-bcachefs-module-7.0.0-39-generic.drv'...