this derivation will be built:
  /nix/store/fn6r07wwfssl4v9f14b31gksnv3z3jww-bcachefs-module-7.0.0-38-generic.drv
building '/nix/store/fn6r07wwfssl4v9f14b31gksnv3z3jww-bcachefs-module-7.0.0-38-generic.drv'...