these 3 derivations will be built:
  /nix/store/hpjap6qs08zi375cvfmicvlwnwh6kpib-treefmt.toml.drv
  /nix/store/sa62rn562hdc54bipzkcngqznpmmy77l-treefmt.drv
  /nix/store/c6bmwg9yc002zhap3ls5s1kbcz7kzj48-treefmt-check.drv