this derivation will be built:
  /nix/store/kap255sp17bi2zwnw38xa9wqcyzmafdh-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/kap255sp17bi2zwnw38xa9wqcyzmafdh-bcachefs-module-7.0.0-39-generic.drv'...