these 3 derivations will be built:
  /nix/store/l86j934h322zlch64vfg1gygyrpiq0pg-treefmt.toml.drv
  /nix/store/80lqpsvf58qsyxq0rgnpp0l5anbq0v2b-treefmt.drv
  /nix/store/2rzarnrxdz41jymj8nxzjmqwj4i8qrv5-treefmt-check.drv