these 3 derivations will be built:
  /nix/store/dps40xpq5v613chrs9rdip8sl0iwrn6h-treefmt.toml.drv
  /nix/store/73an6yvcrzp98q99ys0wcnbi5mqkx4pv-treefmt.drv
  /nix/store/x7h113122923y7q8qbg8f3nfwdz2jwi3-treefmt-check.drv