these 3 derivations will be built:
  /nix/store/ks80aaa2igs4b693iyxhnlgw1mmds51n-treefmt.toml.drv
  /nix/store/p8wcb67q9cv5hfvrl5mds7qdjpg8pxmr-treefmt.drv
  /nix/store/1yp14adx6c2lqvzqqxbxydccpml5srf1-treefmt-check.drv