this derivation will be built:
  /nix/store/47fin20iqs109k1naybl5kqqh6azgcax-bcachefs-module-7.0.0-38-generic.drv
building '/nix/store/47fin20iqs109k1naybl5kqqh6azgcax-bcachefs-module-7.0.0-38-generic.drv'...