warning: unknown setting 'eval-cores'
warning: unknown setting 'lazy-trees'
this derivation will be built:
  /nix/store/vbxn8fhd87p5p1xkwam2m6i9gxkbf0qr-formatting.drv
building '/nix/store/vbxn8fhd87p5p1xkwam2m6i9gxkbf0qr-formatting.drv'