these 3 derivations will be built:
  /nix/store/2d8pmx4cf5q9gpxq1ixm62vrirn1jd77-treefmt.toml.drv
  /nix/store/s1kh7x0c0k324kx9qfr0zz13fghalrwi-treefmt.drv
  /nix/store/bar4z2v66pffab3l4dyw7aa50gnf6yyb-treefmt-check.drv