this derivation will be built:
  /nix/store/kad3zxhfvndfz37qlcd79gg8bb125xdy-bcachefs-module-7.0.0-34-generic.drv
building '/nix/store/kad3zxhfvndfz37qlcd79gg8bb125xdy-bcachefs-module-7.0.0-34-generic.drv'...