this derivation will be built:
  /nix/store/kcah85j3mfv2p6irxgl9sq2a620qd4sf-bcachefs-module-7.0.0-29-generic.drv
building '/nix/store/kcah85j3mfv2p6irxgl9sq2a620qd4sf-bcachefs-module-7.0.0-29-generic.drv'...