warning: unknown setting 'eval-cores'
warning: unknown setting 'lazy-trees'
this derivation will be built:
  /nix/store/n9imzl7bmcknsvc37i31hqpp8bm5x0lj-formatting.drv
building '/nix/store/n9imzl7bmcknsvc37i31hqpp8bm5x0lj-formatting.drv'