these 3 derivations will be built:
  /nix/store/ixk1g1lk5v2il248nzs6hzcq2ph4grl6-treefmt.toml.drv
  /nix/store/n4bwhqhgd242arrmygbq7i84rs2vjzp8-treefmt.drv
  /nix/store/kzmqqln1zpc7jigbsqc09k9n1v0ffq21-treefmt-check.drv