these 3 derivations will be built:
  /nix/store/fz11vi8z3gfb4hzfgn0pr13dg5l2fgfv-treefmt.toml.drv
  /nix/store/xs51qh6xhp416x0xb267byxjd2g6rgfi-treefmt.drv
  /nix/store/si8f0gg9yb2ga95f24mfj5ymg2sy0d9p-treefmt-check.drv