these 3 derivations will be built:
  /nix/store/dvmnll20z4vnc39j3vsm440qr1fmr9xl-treefmt.toml.drv
  /nix/store/i22j2kw4c4zz872jfbbk2dwhgrhwd5jp-treefmt.drv
  /nix/store/910b3l6wdyfjlva5npypi6fjy9nbrwhv-treefmt-check.drv