these 3 derivations will be built:
  /nix/store/703c177j0avivw2007y89zz43sl7s9hm-treefmt-2.6.0.drv
  /nix/store/plazjjzxvfxl3iw42bbn4rf10sa74fgl-treefmt.drv
  /nix/store/qfqrph3hb08i7aps9q86lfrp58kk6pg0-treefmt-check.drv