these 3 derivations will be built:
  /nix/store/wsrrp1ivpxi8m83miq8zlc3rcxf9j110-treefmt.toml.drv
  /nix/store/4wypbwklrss2jm37fwgm5r42pwnzljca-treefmt.drv
  /nix/store/3d7j749lxz3hl6h02mbn0ih1j49qdx8s-treefmt-check.drv