this derivation will be built:
  /nix/store/iw122sbs2b4qgnifh15dfkxj6v2jyqna-bcachefs-module-7.0.0-30-generic.drv
building '/nix/store/iw122sbs2b4qgnifh15dfkxj6v2jyqna-bcachefs-module-7.0.0-30-generic.drv'...