these 3 derivations will be built:
  /nix/store/y4yy9mamcrx44vbr86i21644fwaf7dg7-treefmt.toml.drv
  /nix/store/1z3d8z8pybf43pg1hxks9xrcd5cp2xad-treefmt.drv
  /nix/store/3pxcmx1474bpndw6r92c26987zr6j4c5-treefmt-check.drv