these 3 derivations will be built:
  /nix/store/h8dvykilw5h7glnm6v71nrjwvg6jaciz-treefmt.toml.drv
  /nix/store/hgqmgmikwj6r0yl17pkl8dldw6d98y0c-treefmt.drv
  /nix/store/5n21wy2p4flxp176jl4npcklydhp0sya-treefmt-check.drv