these 3 derivations will be built:
  /nix/store/fh29nj876i0zxi40ij4sdq3vf7sbasri-treefmt.toml.drv
  /nix/store/cs1ymyp1irb8wmx4vivrkqfzrfpfb8c7-treefmt.drv
  /nix/store/qcq6q3z9qsxb2p1nyilrn9h99rzqdbzx-treefmt-check.drv