these 3 derivations will be built:
  /nix/store/fz11vi8z3gfb4hzfgn0pr13dg5l2fgfv-treefmt.toml.drv
  /nix/store/gnbnf0k9r9q3irizfa4nlnmpdjpkgq6w-treefmt.drv
  /nix/store/riv70r69bh8mk4gi5x2igygi5navmw80-treefmt-check.drv