these 3 derivations will be built:
  /nix/store/j1mhg60k3h9ifzbfapcjh15wm4grmawl-treefmt.toml.drv
  /nix/store/agqjfiqjwkd6nmc5g02qfykikwmkxr2b-treefmt.drv
  /nix/store/sjc8nyrcxdd2pjbci3kvqjpykx90xxbx-treefmt-check.drv