these 3 derivations will be built:
  /nix/store/frd1a5ln1xcfnkp61cxhazhl9yfnxl7f-treefmt.toml.drv
  /nix/store/r4ard2jl966fjsm43k6f2pkrm9bg1bac-treefmt.drv
  /nix/store/d1wr2bg3mmrg1q2i1zvg6a3hw4shks5y-treefmt-check.drv