these 3 derivations will be built:
  /nix/store/val5dw8jpfy77sakygcfmgm608vpmzrj-treefmt.toml.drv
  /nix/store/hc159n9z0si0530cv2gr8blsfvqff6q6-treefmt.drv
  /nix/store/z2b7sjs2b1k21cahcq19hbf0gnpn5bgv-treefmt-check.drv