these 3 derivations will be built:
  /nix/store/yx1bq7nw6pjx7sdzd16gidprq4m6falm-treefmt.toml.drv
  /nix/store/hycyvfd4q65nn0hkjm3bf2sqnxrk78rd-treefmt.drv
  /nix/store/z8gjvcxp7jbp6fsm7sqgfjs5hhlymd52-treefmt-check.drv