these 3 derivations will be built:
  /nix/store/bimczjlkkja53v2llr7fzgi9xdhjsgw0-treefmt.toml.drv
  /nix/store/yxp2rnarh95ym588z3kwbm567v5inww8-treefmt.drv
  /nix/store/n92fppf37qsrq0cch9ir5cwdbkg0232q-treefmt-check.drv