these 3 derivations will be built:
  /nix/store/msrbl5h6nqnfyr4hb8n4qpr1xnc15f9p-treefmt.toml.drv
  /nix/store/9xvqd0w1m98iihzkqjr5czm9qlirl7bf-treefmt.drv
  /nix/store/qdxxpdcrz3w06qf9gg43drpz2lip2rvl-treefmt-check.drv