this derivation will be built:
  /nix/store/mfi1xfviim1q27j07h2df03s6wbz9m4l-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/mfi1xfviim1q27j07h2df03s6wbz9m4l-bcachefs-module-7.0.0-39-generic.drv'...