this derivation will be built:
  /nix/store/81zx7qj5imm57ymqcx9smy0zwk69sry6-bcachefs-module-7.0.0-38-generic.drv
building '/nix/store/81zx7qj5imm57ymqcx9smy0zwk69sry6-bcachefs-module-7.0.0-38-generic.drv'...