this derivation will be built:
  /nix/store/mvjc4aw7hhj86wbg23w88himswza32y3-bcachefs-module-7.0.0-30-generic.drv
building '/nix/store/mvjc4aw7hhj86wbg23w88himswza32y3-bcachefs-module-7.0.0-30-generic.drv'...