these 3 derivations will be built:
  /nix/store/428xa9fw9927s71nvm378i17cg9qk7xx-treefmt.toml.drv
  /nix/store/n243qrzag2pf74y8wan8bvzkw0dq6g3b-treefmt.drv
  /nix/store/7396i0pdgwhbins4sd1b713q2yag31hn-treefmt-check.drv