this derivation will be built:
  /nix/store/887ax7qbyyrkbwany7gpn4iw7mvsgsnm-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/887ax7qbyyrkbwany7gpn4iw7mvsgsnm-bcachefs-module-7.0.0-39-generic.drv'...