these 3 derivations will be built:
  /nix/store/5r3f8mgcsi9fvlxrc79jjarci5amxvsg-treefmt.toml.drv
  /nix/store/d36jbaq0j10qpc0paavg602axy5102lv-treefmt.drv
  /nix/store/82x3jvb5s1i8f5iiq2gbadbbvrrf7qci-treefmt-check.drv