this derivation will be built:
  /nix/store/fkp8m89kkjfzyz022qjf4n0b3xs7izj6-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/fkp8m89kkjfzyz022qjf4n0b3xs7izj6-bcachefs-module-7.0.0-39-generic.drv'...