these 3 derivations will be built:
  /nix/store/7ngby9k0d56jjs8zwk9n55m3i3i0yjja-treefmt.toml.drv
  /nix/store/kyxib2d1bpkb3mflxr2yvjc44nh7py56-treefmt.drv
  /nix/store/20xd0kz689d3lmdwmds2jimyisbm2rqy-treefmt-check.drv