these 3 derivations will be built:
  /nix/store/r2xcisiwvhwnklc6ajz6nv5vfya1vnm3-treefmt.toml.drv
  /nix/store/xdvwdc84nxnafalambwpcxwr5k54jss1-treefmt.drv
  /nix/store/wvbd9dgasfn9s39b3cmbz5pk7fc3xq86-treefmt-check.drv