these 3 derivations will be built:
  /nix/store/8fka7qi7b4pswi4ywbh08saz7ssbw2cp-treefmt.toml.drv
  /nix/store/nxl15h98y85z95n9s5x9631cc942n8kq-treefmt.drv
  /nix/store/pnqy7pdxny9gq5ddg5ndgfsgwsphkzm4-treefmt-check.drv