these 3 derivations will be built:
  /nix/store/69alxppr4fhp6ajwsvcbnbmq61q9m3c6-treefmt.toml.drv
  /nix/store/69hmzr9pmxqiibj5grnhq2mq59ww5v29-treefmt.drv
  /nix/store/98p0iq8izbi0l6c4w8mifdivdclvkmw5-treefmt-check.drv