these 3 derivations will be built:
  /nix/store/8s8rh6vd6arj3ywjbdziyjhazpk4r7g6-treefmt.toml.drv
  /nix/store/phf0b729qglx90ig5mhq45816cy4pngq-treefmt.drv
  /nix/store/y1bz5krsbw7pgf32c28k6z5rnx3b6ry4-treefmt-check.drv