these 3 derivations will be built:
  /nix/store/mshk34cj24w08nj561jy1x12xb665qsm-treefmt.toml.drv
  /nix/store/vl4xi43y81i2fpbzw76bcg6dbr2dz5zw-treefmt.drv
  /nix/store/5yvhqx2h6gl8ri3zn3m0rcqjvnyx9xrg-treefmt-check.drv