these 3 derivations will be built:
  /nix/store/75shgdcyzhl1kxpc3ma2017wzf734j02-treefmt.toml.drv
  /nix/store/yk9lsnj4pda89j7z3z8bakv0jfb2rn39-treefmt.drv
  /nix/store/qsrp9xkngxirq5cvpcaqkyskg4dxgmfb-treefmt-check.drv