warning: unknown setting 'eval-cores'
warning: unknown setting 'lazy-trees'
this derivation will be built:
  /nix/store/43xma4r1yldmm6qj0g8y8p4wnbzr386j-formatting.drv
building '/nix/store/43xma4r1yldmm6qj0g8y8p4wnbzr386j-formatting.drv'