these 3 derivations will be built:
  /nix/store/bng88vz8zwgcd2nnrl1vh4a515xwg4k6-treefmt.toml.drv
  /nix/store/nwr6zrpy853bwp8a0ir5119q4rm0czsz-treefmt.drv
  /nix/store/nj2s24i2hxa63d1f2aa4zcwrzx394zvb-treefmt-check.drv