these 3 derivations will be built:
  /nix/store/8mxmlj6fjxs7k4hkifwpd4qwr08qcg89-treefmt.toml.drv
  /nix/store/58gbagxjhkvphsfmfl681p3bkgzridrn-treefmt.drv
  /nix/store/bs6p5r3wysid5kwfp5708na1r52lcni8-treefmt-check.drv