this derivation will be built:
  /nix/store/k6gx868cjg2pxs3f2bkn2jij79d6anp3-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/k6gx868cjg2pxs3f2bkn2jij79d6anp3-bcachefs-module-7.0.0-39-generic.drv'...