these 3 derivations will be built:
  /nix/store/w2229m7iv04vchxj8c9x96xnfhrgva58-treefmt.toml.drv
  /nix/store/q9fch3d316562rgf0088j7l5dbm5r6pg-treefmt.drv
  /nix/store/sy2ba27wq9p6gqfwpnw8b4w3qqxv57xr-treefmt-check.drv