these 3 derivations will be built:
  /nix/store/hnswg332k5d30mc4m2by59hpbkvnzcr2-treefmt.toml.drv
  /nix/store/cgnydcca9z7p0fihs0zxvis3hvv9a12h-treefmt.drv
  /nix/store/d1nl97ydz7swqq9cbyv986f37vx0iph4-treefmt-check.drv