these 3 derivations will be built:
  /nix/store/cyv2bkly5z1gnp8pah783by49cnssf8w-treefmt.toml.drv
  /nix/store/w56ypicv4nflm6b3xh0afkxl9f101dy1-treefmt.drv
  /nix/store/7dfby03k9wsjp4bg9skc45izk4z4amg5-treefmt-check.drv